[Logofast]

What code(s) are you diagnosing?

None except P207F

 

[Logofast]

I did not say that code was for DEF temp. During diagnosing we noticed that DEF temp was reading about 100 deg hotter than ambient so we dropped and cleaned the DEF tank and replaced the pump/sender/temp unit and filled with new DEF. I only mentioned the code because in full disclosure it has that code but no other codes. DEF injector passes all tests and is functional just NOT during the drive cycle between the 2000rpm then idle then 2500rpm. That is the TSB that I have. When I get to the square wave part I never get the square wave. I have done 2 successful manual regens with no codes. I have let it cold soak and reattempt more times than I can count. Anything will be greatly appreciated. Thanks

 

[Logofast]

I was just confused bout the temp sender is all. All I can add is that I have been in your shoes a few times and I know it's frustrating... you have to be missing something in the procedure. Do you have a good place to "drive" the truck where you can finish the procedure, let it idle and then continue driving? I have just kept going and had a coupe just come out of the derate. The PCM just needs to see sufficient NOx reduction to prove the repair. Aside from doing it for you, that is all the advice I have.

MUST HAVE LATEST PCM FLASH! After flashing PCM with latest flash EC3A-12A650-VA was able to perform drive cycle first try! would NOT work with EC3A-12A650-BE flash.