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Thread: can't delete CEL (Permanent Cat Efficiency codes bank 1 bank 2)

  1. #1
    Potential Tuner
    Join Date
    Oct 2017
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    can't delete CEL (Permanent Cat Efficiency codes bank 1 bank 2)

    hello
    i have tuned c63 AMG everything is great except the CAT codes as the car is decated,i have tried few ways to disable the codes and i made sure that there is no other codes in the TCM or ECU..they keep coming back again after time,

    i didn't have that issue with while the car was running someone else tune by WinOls

    Thanks,

    Sam.

  2. #2
    Senior Tuner BackyardTurbo_FTW's Avatar
    Join Date
    Jul 2009
    Location
    East Suckburg, PA
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    1,138
    Besides just deleting the codes for specific faults there are also cat tests and downstream o2 tests you can disable in the engine diagnostic tab. Try disabling those and see if that helps!

  3. #3
    Potential Tuner
    Join Date
    Oct 2017
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    thanks i will give that a try and update you

  4. #4
    Potential Tuner
    Join Date
    Oct 2017
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    9
    Hello,
    i have tried that and i still get CEL,
    that's the only codes the ecu is showing,i confirmed with different diagnostic tools.

  5. #5
    Tuner in Training
    Join Date
    Jan 2019
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    20
    I have issues with turning off the secondary air pump codes as well