Cummins 6. 7. L P1. P2. 42. F Diesel Paticulant Filter Codes Hi All,I have never posted here before, but have spent a great deal of time on this forum and other Cummins and diesel forums looking for information about this code. After learning a great deal via hard experience, I hope to share a little bit back here. Im an ASE certified Master Technician and maintain a fleet of vehicles, including a 2. Ram 3. 50. 0 with the 6. BD Power turbo cool down timer shuts your truck engine down after a heavy haul when the exhaust gas temperature is above normal. Subscribe and SAVE, give a gift subscription or get help with an existing subscription by clicking the links below each cover image. L Power Stroke Engine and Drivetrain Discussion of the 6. L Power Stroke diesel engine and drivetrain in the 2008Up Super Duty trucks. No gas engine discussion. Many people have asked for a tutorial on the Bluetec system on the 6. I figured it was high time it was put all into one place for those who. Description. The Chip Tuning EGR OFF MODULE electronically switches off the EGR motor valve via the factory ECU. The Module is fully plug and play and will never. Special Messages Your manual contains special messages to bring attention to potential safety concerns, machine damage as well as helpful operating and servicing. P1451DIESEL PARTICULATE FILTER SYSTEM PERFORMANCE The engine Exhaust system monitors the soot load in the Aftertreatment diesel particulate filter. L Cummins. At approximately 1. P1. 45. 1 and P2. F codes. Despite steam cleaning the DPF I was unable to clear these codes and eventually sent the truck to my nearest dealer 4 hours away. A new turbo and 7,0. The dealer did warn that the DPF had probably accumulated a great deal of ash and may be near the end of its useful life. About three weeks ago and 4. Usb Sim Card Reader Software Driver here. Diesel Manual Regen' title='Diesel Manual Regen' />P2. F appeared again, along with P1. This time, I wasnt going to waste my time and money at the dealer. Using my OTC Genisys, I was able to view a great deal of data on the exhaust stream and engine performance. No other codes were set an all other systems were operating normally. I tried everything Ive seen suggested to clear this code including using two cheap scan tools, my Genisys, a Snap on scanner that I borrowed, and leaving the batteries disconnected overnight. Bthe_time_bomb_under_your_diesel%2Bstock_dpf.jpg' alt='Diesel Manual Regen' title='Diesel Manual Regen' />The code remained. The datastream on my Genisys told me that regeneration was disabled, and a hard test drive with a loaded trailer confirmed that the system would not regenerate. This was as far as I could go. After a great deal of research, I bought a very nice used Chrysler Star. Scan dealer diagnostic scan tool on Ebay. Apparently this had belonged to a trade school and had hardly been used it had the last software update that Chrysler had issued and all the accessories. It worked flawlessly when connected to my truck, and it taught me a great deal about the P2. F and the DPF itself. Even the Star. Scan cannot clear the P2. F code when it is active. Wondershare Video Editor Full Version Blogspot on this page. When the code is active, the ECU is indicating that it sees an existing problem and there is no point in clearing a code it would reappear instantaneously. In order to clear the code, the underlying factors that cause it to appear need to be addressed. In fact, when I looked at the freeze frame data, I saw that this code was set with the engine OFF 0 RPM. Looking at the data stream from the ECU, what was clearly the problem was the Estimated soot load based on delta pressure. In other words, the ECU was calculating how much soot was caught in the DPF based on the pressure differential between the pre DPF sensor and the post DPF sensor. In my truck, this was 3. The actual pressure differential was 0. I tried to do a stationary regen at this time using the Star. Scan. It would not initiate the test. Regeneration was still listed as disabled because of the P2. F. Figuring that my DPF was terminal, I bought a lightly used and cleaned one from a reputable reseller on EBay and installed it. Now at idle, my pressure differential was 0. The estimated soot load started to drop, and I took the truck for a drive. The load continued to drop down to 2. The P2. 42. F remained active. At this point, I used the one feature of the Star. Scan that is irreplaceable Reset Regenerative Filter Timers. This one step cleared the ECUs memory of all data related to the DPF and immediately my estimated soot load dropped to 0. My pressure differential remained the same at about 0. DPF. After about 1. Heres my conclusion P2. F is set based on values calculated by the ECU using the delta pressure measurement across the DPF. The code will remain active and cannot be cleared by any means until that calculated value drops below a certain threshold I havent been able to find out what it is something between 1 and 2. There are two ways to bring that calculated value down 1. If your estimated soot load is not terribly high and you can clean out your DPF with a hose or pressure washer, it seems possible that you can then drive for 1. ECU will recalculate the load down far enough that the code will go from active to stored, which could then be cleared with any cheapo scan tool. If your estimated soot load is as high as mine was, the ECU will probably not recalculate the estimated down no matter what you do. My new used DPF with a single gram of soot in it was only recalculated down to 2. ECU uses stored data in addition to pressure differential to calculate the load. I could not get this value down any lower. I had to use a Star. Scan to reset the regenerative filter timers. Immediately upon erasing this historical data from the ECU, my estimated soot load dropped to zero even as my pressure differential remained the same. Other scan tools may be able to perform this function, but my OTC Genisys cannot. Lessons learned Make sure that you have identified any underlying problems that have caused excessive soot for instance, problems with fueling, turbo, or EGR. If you have any other codes besides P1. P2. 42. F, diagnose and repair those FIRST. Try removing, cleaning, and driving with your DPF to see if you can bring the estimated soot load down. Without a fancy scan tool you wont be able to see this number, but if it works your CEL may turn off or you may be able to turn it off with a cheap scan tool. As long as the estimated value remains high there is NO WAY to clear the code. If the above doesnt work, the only way to address this problem is to reset the regenerative filter timers. If your DPF is full, this will probably need to be accompanied by a stationary regen and will probably serve as a temporary fix at best. It seems to me that only a Chrysler scan tool can do this. Final note if you work on your truck yourself, I have found that a good used Star. Scan was a worthy investment for the 1,0. I paid. It is limited to only a few years worth of vehicles and no longer has any technical support, but Im certain that I made back my investment in this one fix by avoiding a trip to the dealer. I hope that this is helpful to somebody else out there.