\u00a9 2023 wikiHow, Inc. All rights reserved. If the aftertreatment DPF differential pressure sensor voltage readings are within specification, then proceed to the Linked Solutions section. At one point it reports the charge status of the particle filter and monitors its function. If the air filter is restricted, it could affect the air/fuel ratio causing excessive soot generation. What to Look For in a DPF Differential Pressure Sensor That is Failing . Knowing what good figures are will be a great help. Monitor the temperature readings of the following sensors: The MAXIMUM difference between the sensor readings should be 24oC (43oF). The Pressure Differential Sensor on your 6.7L Cummins tells the ECM how "full" your DPF is. Typically, the engine operating conditions generate high temperatures and allow the passive regeneration of the DPF (self-cleaning). Common Rail Diesel engines have become more common in passenger vehicles in the past decade or so. Check out my diagnostic tool suggestions! Diesel Particulate Filter (DPF) Pressure Sensors . During engine testing, the Cummins engineers have determined the allowed pressure difference levels on the DPF. Appreciate 0 Quote . The cost to replace a DPFE sensor and EGR valve range from $150 to $500. Why do so many guys on this forum change the Y-cable ? JavaScript is disabled. The pipes are then connected to the system where the measurement is to be made. The sensor hoses can become clogged from soot in the exhaust system just like the DPF. , 2501 boost pressure regulator signals fault 2626 DPF soot content too high for regen. Up to 9.5 mm [3/8in] can be cut off the aftertreatment DPF differential pressure sensor elbow fitting end of each DPF differential pressure sensor tube. . The differential pressure sensor on a diesel particulate filter (DPF) is used by the ECU to monitor backpressure and determine when regeneration is required to clear DPM or soot from the system. Can anyone advise on what the typical DPF Sensor readings in mbar would be in the following situations..? By comparing the pressure at these two points, the sensor can track the buildup of soot within the DPF and trigger the PCM to do a regeneration cycle at the appropriate time. The ECM will set the fault if it detects that the aftertreatment diesel particulate filter is not present in the aftertreatment/exhaust system. If we can find it, we should be able to cut post inject to next to nothing where as when the regen is initiated there is actually nothing happening externally but you are telling the ECM that is is happening and it's happy. My specialization is diesel engines and electronic management systems. Using a pressure gauge, measure both hoses. Mopar DPF Pressure Differential Sensor 07.5-12 Cummins $361.81 Add to Cart Buy Now Ask Question Mopar 68453737AA Mopar MAP (Manifold Absolute Pressure) Sensor 07.5-18 Cummins $192.85 Add to Cart Buy Now Ask Question Cummins 2897333NX 07.5-20 6.7L Dodge Cummins MAP Sensor $98.76 Add to Cart Buy Now Ask Question Interstate-McBee M-2897333 Using DDDL go to service routines> SCR & DPF voltages. Product Detail. I just replaced the DPF with a refurbished one and the code comes back even though the new one is in good shape. I would always suggest to use a tool such as Cummins Insite or TEXA (you can even rent one from Diesel Laptops). If you still cant find the pressure sensor in your vehicle, take your vehicle to a mechanic since the sensor may be built into the pipes. 3 0 obj TROUBLESHOOTING: Check for other fault codes, if codes 3609/3 or 3609/4 are present. Some product links are affiliate links which means if you buy something we'll receive a small commission. By signing up you are agreeing to receive emails according to our privacy policy. General DPF faults: 2754, 3133, 3134, 3135, 3316, 3317, 3318, 3319, 3321, 3322, 3396, 5383 Fwiw I am getting 2500hpa back press and 90hpa dpf diff cruising on level ground. Never attempted a regen works by resetting the time plug it in and wait about 10 seconds and crank. The DPF differential pressure sensor is a different sensor that is necessary for filtration to function effectively. I have same scanner and love it. NEW Genuine Cummins OEM differential pressure sensor 4384138. These diagnostic trouble code refer to the condition of the exhaust gas Engines that operate longer periods on light loads (eg. Fired her up and instantly got totally different readings with no error codes. Avoid removing both hoses from the pressure sensor since you wont produce accurate results. Where should you buy your replacement DPF sensor should it need to be replaced? Remove Some posts may contain affiliate links. The ground and signal ports are usually located on opposite sides from one another, so youll leave the middle port empty. If the aftertreatment DPF differential pressure sensor voltage readings are not within specification, then a malfunctioning aftertreatment DPF differential pressure sensor has been detected. Be careful in removing the sensor and hoses, as there are other sensors in this area that can be easily damaged. Verify your repair and continue to the steps below. Well I just replaced the DPF differential pressure sensor and cleared the codes, however two codes came back . Some of the add-ons on this site are powered by. High Class Service Truck. '6 sMZiMDLWzRu7h55 SDhGCp]%iO '#Tgq&YK_/inyx*TEa"|E$8qRB B8~ Pc#V. thanks, Frank. i also removed the hydrocarbon doser and cleaned that, along with cleaning the imap sensor, cleaning the egr differential ports and sensor, the exhaust back pressure sensor, and even replaced the exhaust pressure . The cookies is used to store the user consent for the cookies in the category "Necessary". Cummins Exhaust Temperature Sensor OEM 4954574. You get a considerable pressure drop (offset) with a high flow in a restricted passage, while it tends towards zero with a smaller flow. For a better experience, please enable JavaScript in your browser before proceeding. Although a three tenths of a PSI doesn't sound like much, I still wonder if there . DPF differential pressure sensor signal voltage. http://www.cumminsforum.com/forum/6-7l-tech-articles/233548-egt-sim-basics.html. Turn on the ignition switch without starting the engine. my thoughts like i said were to manipulate the DPF sensor in a way that it would send the appropriate signals to the ECM telling that it is in This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Check out my diagnostic tool suggestions! Ended up finding a lot more information I wanted to learn. Following verification, proceed to the next steps. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. At ambient temperature26C (78F) and above:Voltage reading should be between 0.642 and 0.738 Volts. Once you remove the guts from the DPF, you will end up with a check engine light and the engine will eventually go into De-Rate. Free delivery for many products! Another ? 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. Also Mike, I do not idle it very long at all . Replace the whole assembly). Variation: If you have trouble keeping the probes against the pins, opt to use ones that have alligator clips and attach them to the pins so you dont have to hold them in place. Steps. To test if your battery is working properly, you'll need to connect the multimeter ground with one lead connected directly onto its negative terminal and run a quick "plausibility" check. The Cummins ECM uses a Differential Pressure sensor to monitor exhaust flow through the filter. In theory, theory and practice are the same. The DPF differential pressure sensor (DPS) has two pressure sample lines. I listed the most important troubleshooting steps below. I disconnected the exhaust outlet and ran a snap test and found no smoke exiting the engine. If any problems are found, check once more that you performed the checks correctly. This enables the diesel particulate filter to remove more contaminants from the system and keep your diesel emission system working properly. 4.6 V depending on differential pressure. The more complex, the better! Otherwise, you can remove the sensor and test the electrical resistance between the ports. We also use third-party cookies that help us analyze and understand how you use this website. That's the point behind controlling the map designated for the post injection responsible for the added heat and fuel for regeneration. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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