Dpf differential pressure during regen. DPF_LOAD is based on trhe differential pressure.

Dpf differential pressure during regen Technicians often use specialized tools to measure this accurately, confirming if it falls within acceptable parameters. Once the regen is complete, you can wrap up the process. The regen starts but after about 5 mins the idle becomes lopey and the exhaust temps only go as high as 360. If either of these reaches the threshold, a regeneration will be performed. May 10, 2016 · The basics are differential pressure (how blocked it is), and pre and post DPF temperatures. Jan 21, 2015 · Mine typically regens down below 6g then immediately shoots up to 10/11g as the DPF cools. The DPF Differential Pressure ( bottom right box ) shows 226 which is very high if the engine was just ticking over. Oct 30, 2020 · The differential pressure measurement is used to calculate the soot load. the differential pressure sensor to calculate the soot in the DPF and the other uses other engine data. You can check those in the live data measurement. Differential pressure sensor readings at the DPF are disabled during regen and don't start Aug 7, 2020 · The PCM determines the load condition of the DPF based upon the engine operating points and the exhaust gas pressure upstream and downstream of the DPF. Monitor the exhaust gas temperature readings during a regeneration cycle. 5 box Sold 2021 LM2 Sierra 4x4 crew 6. The computer takes readings from them and when the pressure differential gets too high, triggers a regen. 6 TDCI engine. Jun 25, 2020 · Need to monitor the dpf differential pressure while driving. Jun 9, 2008 · The ECM determines the load condition of the DPF based upon the exhaust gas pressure upstream and downstream of the DPC/DPF. During a DeSox event, the engine enters a new operating mode, similar to DPF Aug 12, 2018 · The gist of the DPF system behavior that I'm observing is regenerations happening at different intervals that are more frequent than I expect, and the regeneration history consistently shows "key off" after about 720 seconds ("normal" regeneration time) as the reason for terminating the regenerations despite my having a ScanGauge II and being Jun 3, 2012 · IMAP sensor (intake manifold air pressure) EGR differential pressure sensor Maybe DPF differential pressure sensor Maybe Exhaust back pressure sensor if these sensors don’t read right and are carbon packed, it will throw all sorts of stuff off Oct 18, 2021 · Could use a little help with a regen issue. Jul 21, 2019 · Since it is near the sensor, and on the back side of the engine, a bit more rubber hose is unlikely to be a problem. inlet pressure (pin 87) and DPF outlet pressure (pin 72) voltages with the key ON, engine OFF. 56 volts? a. If the soot levels reach the limit required for regeneration, the sensors alert the ECU by sending differential pressure readings, which then trigger the regeneration system. This process occurs on a regular frequency that varies based on system and application. Oct 8, 2009 · In addition, I replaced the "DPF differential pressure sensor" (just a shot in the dark guessing). This would seem to suggest that the dpf is not in bad nick for its mileage (70k) all things considered. – A skewed or shifted Exhaust Pressure Differential sensor. This sensor monitors the soot levels on either side of the DPF filter, measuring the pressure drop and sending differential pressure readings to the ECU. A ban has been issued on your IP address. The regen cycle will run and restart according to the preset programming, and is not just dependent on soot load. Jan 29, 2021 · The output gas temperature is lower than input gas temp so nothing is in the DPF to be burnt. • Check for a non-plausible EGR temperature value during valve activation. B) At 7 Oct 9, 2024 · 500-650°C during regeneration: Temperature of the DPF during the cleaning process: Exhaust Gas Temperature: 350-500°C: Temperature of exhaust gases entering the DPF: Differential Pressure: 0-30 kPa: Pressure difference across the DPF, indicating clogging level A diesel particulate filter (DPF) differential pressure sensor measures exhaust backpressure and signals when the power-train control module (PCM) should begin a regeneration process to clear the filter of diesel particulate matter (DPM), or soot. Sep 2, 2011 · Excessive pressure differential reading and the ecm thinks the dpf is plugged or plugging leading to limp mode. Here are some signs that indicate the DPF is not regenerating properly due to the DPF sensor failing: Poor engine performance There is a significant amount of black coating on the surfaces behind the DPF The soot level is above 200%, the DPF inlet looks very dirty, and the differential pressure is above 15 kPa (2. Don't know anything about Freightliner's but if you have a pressure sensor for the DPF maybe check that hasn't failed or gotten choked up. Or at least normal value for boost pressure. 1 f DPF Intake Temp - 1081. I have performed all three with the same result the DPF differential pressure is under 0. b. Mar 21, 2018 · The DPF retains the non-combustible ash as a by-product. If the open and closed loop values are widely different then that woud indicate a problem somewhere. Did a forced regen and saw that during the regen, the soot level changed between 27. Nov 6, 2023 · Monitoring the DPF vitals, I am noticing very high differential pressure (40hpa on idle, around 400 hpa at 2500rpm). The engine control module (ECM) notifies the driver that a forced stationary regeneration is needed so the driver can start it with a switch on the dashboard. One thing I've found out is that when towing, I never have an active regen. Apr 7, 2013 · egr differential pressure: 0. Are the DOC inlet and DPF outlet pressure sensors voltages between . 2 f Turbo Intake Outlet Air Temp - 260. 5 box, 2018 L5P Sierra 4x4 SB, 2011 LML Sierra 4x4 CCSB, 2010 LMM, 2004. 0 l/100km average (47mpg), and the car had plenty of power. I checked for leaks in the exhaust and nothing in there. Mack Trucks, Inc. We removed the differential pressure sensor for testing. 2 InHg EGR Valve Commanded - 2% Intake Manifold Pressure - 16. The temperature sensor upstream of DPF monitors exhaust temperature during regeneration. There’s a sensor on the way in and a sensor on the way out, and it measures the pressure drop across the DPF. I would guess that your DPF differential pressure sensor is probably faulty & giving out incorrect data. 5- Year 2014) with a 1. There are 2 exhaust pressure sensors. e. Date Group No. 7 f Are Oct 30, 2024 · Testing differential pressure across the DPF is also key during diagnosis. 33. No; Go to step 5. I removed the DOC and DPF and sent out for cleaning. I have this truck for 3 years and every forced regen i did was successful and most of the time DPF differential pressure would be zero after the regen. The decision often depends on a few factors including symptoms, diagnostic results, and vehicle history. Here are some key factors that can prevent DPF regeneration… Short, frequent trips – DPF Active regeneration Jan 10, 2007 · The ECM then commands a regeneration event in order to restore the DPF. It's coming up because it sees the RPM increase, knows that the exhaust gas volume is increasing, and yet thinks that the differential pressure across the DPF isn't rising. P244B - DPF Differential Pressure Too High P244C – DPF Differential Pressure Too Low P244D - Exhaust Temperature Too High For Particulate Filter Regeneration Bank 1 Possible symptoms * Engine stalling whilst driving * Engine cranking but not starting * Going into limp mode whilst driving * Check engine light ON or service engine soon warning May 9, 2019 · Yes, but its bad practice to force a regen if its not needed. 5oz to 1. Feb 4, 2011 · The way I understand it. Jan 18, 2020 · Soot load at zero. Set a differential pressure fault and soot load is now reported as level 3. 0 hpa after a good cleaning by the regen with new after-treatment injector). I recommend verifying during the regen. Jun 8, 2018 · During a stationary (parked) regeneration, these are the typical values for a healthy system: EGR differential pressure - less than 12. If this machine runs def you can have def crystals clogging the pipe. As you can see there are other factors besides the pressure differential that causes the E98 to perform a Regeneration such as distance travelled since last Regeneration. The regen should be activated around 25grams of soot +/- automatically. Regeneration issues on these trucks require a good bit of proper diagnostic work in order to determine the root Jan 10, 2024 · A DPF pressure sensor is necessary to keep the DPF free from diesel particulate matter and soot, and if the DPF is plugged, the regeneration process will not fix it. Inspect electrical connections between suspect sensor connector and Aftertreatment Control Module (ACM) for bent, Aug 29, 2021 · If for instance you had a code for a differential pressure sensor failure, and you keep running it, the ecu won't recognize when the dpf is getting plugged, and all at once boom--it gets clogged up, egt goes through the roof, it goes to dpf soot level 5 and now you have to pay the dealer to take the dpf off, send it out for cleaning (if Jul 21, 2020 · MAP: Enables/disables the Differential pressure sensor monitoring. Recently bought a super nice condition 2012 E70 35d w/ 150K miles from a BMW dealership for an awesome price due to the persistent 452A code & the BMW dealership's insistence that Apr 9, 2016 · Hi, After a short ride : 40 km on highway and 15 over interstate I've seen probably too much pressure on G450 : first part with DPF from 28% to 44% ( 62,59 grams of ashes ) AVERAGE 178,5608412619 mbar ECARTYPE 110,3927556495 mbar ECART. 44 to . One before the DPF and one after it. The algorithm is corrected with the values seen by the differential pressure sensor. The main use of the temperature is it can tell when an automatic DPF cleaning cycle has started, and this you can determine how often they are running, and so see if it is working like new or running too often which is an indication of high ash and Feb 6, 2020 · Hello! I have recently been having alot of issues related to my DPF on my 2009 C-max 1. And last but not least clogged dpf filter. Performed dpf regen analyzer test Test failed “exhaust gas pressure is below minimum spec Engine Oil Pressure (PSI) DPF Soot Accumulation (%) DPF Temperature (°F) DPF Differential Pressure (PSI) Average DPF Inlet Temperature During Regen (°F) Average Distance Between DPF Regenerations (Miles) Distance Since Last DPF Regen (Miles) Exhaust Gas Temperature Sensor 1 (°F) Exhaust Gas Temperature Sensor 2 (°F) May 22, 2012 · I already cleaned it before I even tried the regen and have replaced the exhaust gas pressure sensor and the boost pressure sensor it still just runs the regen but never turns on the doser the only active code is dpf differential pressure data valid but above normal operational range least severe level. The DPF differential pressure sensor can become damaged due to bad wiring, as well as clogged or corroded sensor hoses. “Diesel particulate filter differential too high” means that the pressure sensors before and after the DPF are reading a BACKPRESSURE that indicates that the volume of soot and ash within the DPF is nearing the upper limit and thus diminishing exhaust gas flow through the filter. Jul 2, 2024 · The DPF differential pressure at idle was 0. I have a 2014 Volvo 780 - cm2350 with 297K miles. The fault code logged during different conditions and the pressure was likely higher than what you're seeing now. Differential pressure refers to the pressure difference between the inlet and outlet of the DPF. 5 psi at end of regen. Will use a manometer to do so but I will have to make on first. The exhaust pressure differential sensor is also used to monitor the filter for cracks or holes in the filter substrate. May 17, 2008 · The ECM determines the load condition of the DPF based upon the exhaust gas pressure upstream and downstream of the DPC/DPF. The calculated soot load then decreases based on an algorithm using things like the time in regen and conditions during regen. If they were not then maybe the DPF was faulty or the Pressure Sensor was giving a false reading. 2 inhg egr valve position commanded: 0 egr valve position measured: 0 exhaust gas pressure: 94-95 inhg intake manifold pressure: 6. 5 LLY Dec 28, 2022 · The DPF differential pressure was around . If it's seeing a invalid value (too low/too high) then the car will do nothing and probably go into limp mode. 5 in-hg] EGR valve position measured (percent open) - less than one percent So during a regen the pressure will rise due to the heat; more heat equals more pressure, more pressure equals more heat. Soot mass dropped from 3. What is the issue or fault that you're diagnosing? diesel particulate filter (DPF) regeneration when passive DPF regeneration is insufficient to prevent a high soot level in the filter. Jul 31, 2021 · 'DPF Regeneration Enabling' performs a moving regen during next drive cycle,(you have to shut the ignition off and open the door) 'Particulate Filter Regeneration' performs a parked regen when coolant is over 140f If your getting frequent regens, it maybe a bad DPF differential pressure sensor. Failing or clogged dpf differential pressure sensor. The problem is that like every 2000 miles gives a fault for SCR system or DPF filter efficiency, then after regen drives good for another 2000 miles. I recently replaced the NOX sensor / dozer valve and DPF Differential Pressure sensor. During the regeneration process, the PCM raises the temperature in the DPF to burn off soot accumulated. The DPF failure is unrecoverable and it must be replaced. 1 psi at idle. EGT 3 is just interesting to watch during a regen. In the DPF module check for soot levels. I've check the PID and before May 2020 it made sense. Jul 3, 2017 · My truck is not lowering the soot level after the regen, it completes the regen as usual with the temps good but the soot level stays the same and it asks for more parked regeneration. Feb 14, 2019 · What's "Normal" vs "Excessive" DPF differential pressure? Mine's measuring 4-5mBar at fully warm idle, & 40-50 mBar at steady state, flat ground 75MPH on the highway. It would go up steadily. What the dpf temps are. 8) After the successful regen, I did a counter pressure test and the idle value was approx 20mBar. Jan 25, 2025 · During Regen instead of DOC temp staying steady and DFP temps going up, this engine shows DPF outlet temp staying steady while DPF intake and DOC temps keep going up (1000+). One sensor, located ahead of the DPF Jun 2, 2023 · The DPF pressure differential sensors are somewhere before and after the DPF. 6 f DPF Outlet Temp - 1149. Jul 15, 2024 · -EGTs sat mostly between 550-600°C during regen-No real change in DPF differential pressure before and after regen Changed my oil yesterday so interested to see if the k's between remain higher while it's fresh, if that makes any sense. A negative value or low value, for instance . Aug 7, 2018 · This simply means that your DPF needs cleaning. 4. DPF Differential Pressure This is the difference in pressure before and after the DPF during regeneration. 2 f EGR Differential Pressure - 0. Aug 6, 2015 · I have been able to spike my delta pressure to over 2. 8psi and slowly dropping to about . Passive regeneration; This increased quantity of fuel occurs automatically with no warning light indication displayed. In this theory, the leaky exhaust connection heated up the pipes that lead to the differential pressure sensors and contributed and/or caused the failure due to heat soak. Aug 25, 2011 · I have decided I'm going to measure the pressure differential when the DPF is about to regen and then right after. Just so you guys know the declining soot gram numbers during regen mean nothing and are purely B. Jun 10, 2007 · The soot load is measured using the pressure differential across the DPF so it is nowhere near accurate. A pressure differential sensor provides the pressure input to the PCM. It measures exhaust back pressure and controls when the ECU should activate the particulate filter regeneration. 13 and while regening it was 0. Mar 4, 2020 · But DPFs also have a differential pressure sensor. One injector bad, replaced. DPF_SOOT is calculated. And two inactive codes for coolent level Regeneration is a process used to remove Carbon (C) build up from the DPF catalyst. Please contact the Board Administrator for more information. 2 kpa in the manufacturers spec so i told him to remove it and get it cleaned and check after that. 05 psi at idle, it's very close to a regen. Feb 4, 2024 · been used. None of the three different type of regens are currently requested. Aug 13, 2013 · Then perform a DPF 'Forced Regen', ensuring the DPF is still below 3. What is DPF regeneration? Put simply, this is the process by which the DPF burns off accumulated soot. Oct 29, 2024 · What does the P2453 – DPF Differential Pressure Sensor A Circuit Range/Performance mean? The P2453 code is a diagnostic trouble code (DTC) that indicates an issue with the DPF differential pressure sensor A circuit. Now the temp sensor is before the doc so it won’t read the 700-1000° you’re expecting Sep 13, 2024 · Make sure to check parameters such as fuel pressure and differential pressure during the regen process. Today, we have an International ProStar with Cummins ISX15 engine came to our shop with high differential pressure, DPF wouldn't regen, and super high soot l Information. 72kPA (idle). All I have is a 24" and I need at least a 48". new DPF differential pressure sensor. The ECM then commands a regeneration event in order to restore the DPF Apr 14, 2023 · Following a 30 mile motorway journey this morning, during which an active regen brought the soot trigger value down to 12%, the differential pressure at idle was about 10 millibar and at 3000 rpm it was about 75 millibar. Low exhaust temps, exhaust leaks, intake leaks, low boost pressure, clogged egr differential pressure sensor and or port . The two made a significant difference: The regen cycles extended to between 100 and 250 miles while driving highway speeds, the power improved significantly and the EGTs looked a lot more normal. DPF_LOAD is based on trhe differential pressure. Your numbers are further apart than I would expect on my car. Active regeneration May 25, 2017 · Soot load readings tend to be an approximation because they are based on the pressure differential across the DPF. 5, 2008, 2011, 2013), I can confirm that there can be very large variances in mpg during and after regeneration. All modules are updated to the latest versions, and a new differential sensor for the DPF has been installed. Pressure reading of 0. Jan 25, 2019 · SPN 5319 FMI 31 (FCAP) Cummins 3376 DPF incomplete Regeneration SPN 3251 FMI 16 (FCAP) Cummins 1921 Aftertreatment Diesel Particulate Filter Differential Pressure - Data Valid But Above Normal Operating Range - Moderately Severe Level SN 3251 FMI 0 (FCAP) Cummins 1922 Aftertreatment Diesel Particulate Filter Differential Pressure - Data Valid But The regen light is flashing on the dash but there are no DTC’s regarding DPF differential pressure. Solutions and Prevention DPF Differential Pressure (PSI) 07E02CFE809D; D2E843FE0000; 1808; Average DPF Inlet Temperature During Regen (°F) Average Distance Between DPF Regenerations (Miles) Customer: Isx 15 79915003 Fault code 3135 Already inspected differential pressure sensor tubes for restrictions. Generally, high differential pressure = high DPF restriction, and conversely, low differential pressure = low DPF restriction. Runs ok but 2639 code returns and it Aug 20, 2024 · Check the DPF differential pressure sensor for proper operation. 15ish psi by the end of the regen. While viewing the data in PTT i see the turbo only reaches a maximum speed of 22K RPMS and my May 30, 2020 · When driving, I get the P2002 code (particle filter system below efficiency) and live data shows the pressure differential across the DPF to be constantly at 0. The DPF differential pressure sensor detects the difference between the exhaust pressure upstream and downstream of the Diesel Particulate Filter by means of the exhaust pressure sampling pipes Dec 15, 2013 · Truck completed regen cycle at the dealership put it back to work and it regened about 3 times and then failed again. During Regen instead of DOC temp staying steady and DFP temps going up, this engine shows DPF outlet temp staying steady while DPF intake and DOC temps keep going up (1000+). 6 tdci. 5 inhg percent load: 0 turbo actuator position commanded: 96% turbo actuator position: 96% dpf soot load: normal coolant temperature: 209f doc inlet: 432f dpf inlet: 421f dpf outlet What to look out for in a failing DPF differential pressure sensor. Cleared fault code P242F (DPF overaccumulation) but it came back on during test drive. I noticed dpf inlet and outlet temps would only get to around 700-800 degrees fahrenheit which I don't think is hot enough. I have reset the DPF data and adaptive factor values. Sometimes they fail and constantly think the pressure is too high because the DPF is choked with soot even though it isn't. During the regeneration process, the ECM raises the temperature in the DOC/DPF to burn off the soot accumulated. 0-6. DPF cleaning or replacement: Perform a forced DPF regeneration using a scan tool Jan 20, 2009 · Pressure Sensors --The exhaust differential pressure sensor (EPS) measures the pressure difference between the inlet and outlet of the DPF filter. Feb 20, 2024 · If the gauge is showing that the DPF is filling that quickly, you either have a faulty differential pressure sensor, a failed or failing DPF, or an issue upstream that’s causing contamination or significant soot loading in the DPF. Apr 7, 2013 · Once a regen is initiated the DOC inlet and DPF inlet need to reach about 525 -550 degrees. 6 psi during regen. This doesn't necessarily mean though that there is any connection between mpg and a "clean" dpf/scr. – Improperly routed differential pressure lines—The exhaust differential pressure line should have a continuous downward gradient without any sharp bends or kinks from the sensor to the DPF. But, my ML350 Bluetec continues to make a dpf regen every 150 km. Driving the truck you'll notice a different engine pitch, and higher idle while stopped. The DPF may be cracked internally and the DPF differential pressure sensor is not detecting that the DPF is loading with soot. It will need to either be removed, professionally cleaned, or replaced, both options being much more than the cost of diagnosing and replacing a faulty sensor. 6 days ago · Rawze, I just wanted to say THANKS! I came across this sight yesterday after searching google for "DPF frequent regen". On the DPF is a differential pressure sensor. Mar 11, 2021 · Several things can cause frequent regeneration. There are not really any published guidelines on this. Truck is calling for a parked regen and it fails. MOYEN 85,8194944395 mbar MAX 692,5 mbar à 3946 tours Mar 14, 2004 · Having monitored regeneration mpg behaviour numerous times since 2007. , $150-200 for Delta-P, 3 five-gallon buckets for holding your coolant, and a day of downtime, while drinking beer and The DPF was replaced and reset. This is actually done by the turbo vanes closing, causing high exhaust back pressure and load on the engine. There isn't any direct "weighing" of the soot, it's all just a guestimate. Ash, as opposed to soot, gradually builds up in the DPF, increasing the back pressure in the DPF. Exhaust Gas Temperature Sensors --During regeneration, two temperature sensors are used to monitor the process. Took it back to the shop and they cleaned the DPF filter changed the sensors that were melted from the excessive heat during regen and and claimed the heat and soot buildup was being caused by bad injectors and cups. They perform the role of detecting the soot levels in the DPF by measuring pressure drops. You have been permanently banned from this board. Bit faster when cold/warming up, slow and steady when on the highway, trigger a regen above 65%, go back down. After a completed regen pressure drops to 0. Sep 10, 2024 · Use a scan tool to monitor live data from the differential pressure sensor; Perform a manual DPF regeneration cycle and observe pressure readings; Use a manometer to bypass the OBD system and obtain accurate pressure readings; Potential Solutions. That is why that sensor is as far away as it is, on the other side of the engine from Feb 22, 2021 · It will go down to 0 grams for a successful complete regen, but it soon rises after Regen. When DPF regeneration is inhibited, it can lead to filter blockage, reduced engine performance, and potential engine damage. Both codes went inactive on their own during this Regen. This sensor monitors the difference in pressure between the inlet and outlet of the diesel particulate filter (DPF). May 4, 2021 · Theory 2 - The loose DPF Injector clamp contributed to the failure My buddy found this failure on his car before the burned up differential pressure sensors. This can vary depending on the amount of exhaust flowing, and how much ash is present in the DPF. About when the DPF inlet temp got around 800F, something happened and the differential pressure went from around 1. The pipe is almost certainly as long as it is and stainless, due to the 1200F plus EGTs associated with the DPF during a regeneration event. If, following a DeSOx event, a DPF regeneration is required, the DPF regeneration is performed as described earlier in this section. You can also check differential pressures using a bar graph. When the DPF differential pressure sensor stops signalling the PCM to regenerate, the DPF can become completely obstructed by contaminates and fail. Pressure), 4713(Fuel Injection Quantity error). 6 throughout the regen Technician: Nich M. A service technician can start it manually in a safe DOC Intake Temp - 946. Normally the higher soot load would prompt a regen to convert the soot to ash. 2023 LZO Sierra 4x4 crew 6. The sensor’s readings measure how well the system is working, and a faulty sensor can interfere with the regen process. If there is too much time before regens and there are no fualt codes the most likely reason is a breached DPF. Having had problems getting the car through an MOT emissions test I put some DPF cleaner in the tank and been riding it for a month to clear out soot, doing some high rev journeys (keeping it above 2500 revs for 30 min stretches). The pressure difference between “exhaust in” on the DPF and “exhaust out” on the DPF, monitored by the Exhaust Pressure Sensor is utilised by the ECU to select and perform a DPF regeneration procedure. 6 kpa, over the 1. The DPF may be cracked or melted internally. The ecu uses a pressure differential sensors in the DPF to calculate the load/pressure infront and behind the dpf filter. surfaces behind the DPF • The soot level is above 200%, the DPF inlet looks very dirty, and the differential pressure is above 15 kPa (2. 7 mm-hg [0. When the pressure difference has increased above a calibrated threshold, it indicates a high particulate loading condition. Perform a forced DPF regeneration if necessary. Its the same one as in MK 3 focus and Mk 7 Fiesta. Usually the regen temps shoot up pretty quickly on the T2 when the fuel starts dosing. Yes; Go to step 6. 2 PSI (1. 5 psi under load. Regen stopped and temps started coming back down. done two local jounreys recently and now May 12, 2023 · A vehicle never able to complete a regen and which initiates one on start up before the water and oil temperature are at the required threshold is one that has serious problems and will be wearing the bores and diluting the engine oil, either the DPF is clogged with oil ash which cannot be removed during a regen or there is a problem with the Jan 15, 2016 · Regeneration occurs when the ECM calculates that the particulate level in the filter has reached a calibrated threshold using a number of different factors, including engine run time, distance traveled, fuel used since the last regeneration, and the exhaust differential pressure. – Leaks or internal restrictions from theExhaust Pressure Differential sensor lines. figures the ECM outputs. During the regen, the measured soot does go down to about 5 grams, however after it's done, it increases incredibly quickly and reaches the 23-24 gr threshold within 20-30km, thus kicking off another regen. SERVICE REGENERATION A Service Regeneration is designed to lower the soot accumula-tion in the DPF in a very controlled way. The purpose of this sensor is to determine how much restriction is in the DPF. 09, high idle 0. Release Page Service Bulletin 10. The levels of emissions can increase substantially during DPF regeneration—especially during active regeneration events but also during stochastic regeneration in passive filters. Temperatures during active regen can reach as high as 1300 deg F. Initial codes:3376(incomplete Regen), 2639(DPF diff. If the issue persists, remove and inspect the DPF for physical damage or excessive soot buildup. 2 psi) when checked with VCADS. Nov 4, 2014 · I know when the DPF psi is getting up to about . Nov 14, 2024 · The DPF sensor, known as the Differential Pressure Sensor, is responsible for the smooth functioning of the DPF. In the past year, I got DPF, NOX sensors, temp sensors, and differential pressure sensors changed. 2oz. 2012 255 42 03 3(23) DPF Delta Pressure Check (before service DPF regeneration) The purpose of this test is to check that the DPF is not over- Aug 3, 2017 · The DPF soot load is a calculated value that relies on an algorithm based on operating conditions and fuel used. Jan 19, 2021 · The engine is an isuzu 4jj1 and the problem reported is that the machine will run regens automatic and manual about 10 times a day! Back about a month ago i checked differential pressure and at 2200rpm (max rpm) pressure was at 2. 8ish psi and slowly dropped to 0. one that decreased when the regen conditions were met. 5, across 4 different trucks (2007. Oct 29, 2020 · Second time was a forced 20 minute regen. Got back to the shop and performed a parked regen. Until about November the car was functioning perfectly, fuel usage was low, less than 5. Mine is generally under 1 psi driving empty and can go up to 2. MAP: Enables/disables the differential pressure sensor quick change monitoring. The Dpf differential pressure during Regen was 1. A pressure differential sensor provides the pressure input to the ECM. It reaches the required temperature adequately during a regen, but the differential pressure remains low whenever checked. As I stopped the regen, it gave a short acceleration and spiked up to 0. 1 at Idle and maybe 2 or 3 when steady cruising at speed. Jan 31, 2023 · Replaced (used) DPF, 7. cost?,$300-400 for after-treatment inj. 4 kPa) or less, at full valve activation is an indication of an EGR dP sensor and/or venturi tube issue. Jun 22, 2007 · Pressure Sensors -- The exhaust differential pressure sensor (EPS) measures the pressure difference between the inlet and outlet of the DPF filter. . DPF temperatures during an active regen will quickly climb to 1000 deg F in order to quickly burn collected soot off and allow the DPF differential pressure to come back down. 0 hpa (it will almost always be below 2. The ECM then commands a regeneration event in order to restore the DPF. Nov 7, 2021 · When the DPF was renewed the Differential Pressure should have been no more than 0. Faulty DPF pressure sensor. new EGT sensors, 8. Ran live data right after the first regen & differential pressure was at 0. If a DPF regeneration is not required after a DeSOx event, the engine management system will return to the normal operating mode. 00psi while in a regen and putting the pedal thru the floor board you would really have to work hard to build a lot of differential thru the DPF. Out of Regen, the soot value is 'real' albeit a function of DPF differential pressure. Regen takes about 20-30km. It will keep regening until the pressure differential drops to an acceptable (whatever the computer is programmed for) level. The amount of oil I dropped was the same as last service, don't appear to be increasing in level over time. The turbo doesn't have waste gate. 42. Are regen requests in this engine based solely on differential pressure? • Check for a non-plausible differential pressure value during valve activation. S. 63kPA (idle) after second regen. 3 InHg Turbo Actuator Commanded (Percent Closed) - 4% Turbo Actuator Position (Percent Closed) - 4% Turbo Intake Air Temp - 96. Should I pull the DPF and get it cleaned? The DPF differential pressure and DPF outlet pressure will vary greatly during normal operation and during a regen. 8 psi to around 4 PSI. The next "sucpect" i think is the thermostat. Reply reply 30 minutes into the regen the outlet temperature kept climbing and to about 1260 degrees before I shut it off, the differential pressure stay around . Just a thought. Jan 29, 2025 · Basic regen information below, but at 24grams and 700km's (435 miles) from last regen suggest to me that your DPF system has a major problem – Has anybody checked the differential back-pressure sensor? At less than 7g the DPF system will automatically clean itself whilst driving once the DPF is up to the correct operating temperature. A comprehensive analysis helps determine if further testing is necessary before proceeding with repairs. May 14, 2022 · Hi, I need Cascadia DD15 GHG 17 normal values during regen. The affected emissions may include NOx, PN, PM, HC, CO, CO 2 (fuel economy) as well as unregulated species such as HCHO, NH 3 and SO 2 [5608] . For example a 2007 system might have regenerated every 12-24 hrs whereas our 2017 systems might make it >100hrs before requiring a regeneration. To make it right I finally had to pull the filter and have it cleaned and went ahead and had the top part ( catalyst) cleaned too. Jul 24, 2021 · The first graph is the DPF soot load. 5. Feb 9, 2021 · Hi, I have a Ford mondeo (Mark 4. If the dpf outlet is significantly higher than the inlet then the fuel is catalyzing in the dpf and not the doc as intended. Aug 25, 2019 · Particulate Filter Differential Pressure code The Particulate Filter Differential Pressure: If it's reading a high value it will trigger the car to do a regen during normal operation. What's your DPF differential pressure during the regen? You can also try an AHI self-test, although that would throw a code if it failed. 3g to a variable but more realistic value, i. Using multimeter: Jan 3, 2022 · It could be that your regens are being triggered before the limit is reached if the differential pressure goes too high when running, that could be because your DPF is in fact quite full with oil ash which cannot be burnt away or it could be because the differential pressure reading is wrong and the sensor needs a true offest figure applied. It is not as effective at Should I replace the DPF differential pressure sensor or clean the DPF first? When faced with the SPN 5319 code, it’s crucial to determine whether you should replace the DPF differential pressure sensor or clean the DPF first. Mine went back up to around 25g within a few minutes. Severe black coating on the surfaces behind the DPF indicates that the DPF is cracked or partially melted. As that pressure drop increases, the car knows the filter is getting more and more blocked - because more pressure difference equals more particle load and resistance to flow. Mar 29, 2021 · Paying special attention to Ambient pressure as per the post above, I'm pretty sure it is working perfectly. snrzg lxyhljup hvch pokj valfxqe xpscle jhum qmh aphvg oqqukd xymp rcxjcqx txlri pelen yveoo