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Thread: fuel system readiness wont set ? 15 sierra 5.3

  1. #1
    Advanced Tuner
    Join Date
    Jul 2014
    Posts
    218

    fuel system readiness wont set ? 15 sierra 5.3

    Did a some basic tuning to my 15 sierra . Now after hundreds of miles the fuel system readiness monitors will not set?



    I payed for the credits for the ecm and tcm, did no pay for the fuel module since I didnt need to tune it. I did the read without it and write without it.

    Could that be causing my issues, I cant see any other reason on why the readiness monitors wont set.

    If anyone has any suggestion or trick on what to check or how to get them to set im all ears.


    tylers truck read 8-29-19 catalyst off.hpt

  2. #2
    Tuner in Training
    Join Date
    Jun 2017
    Posts
    10
    Catalyst p0420
    Evap p0442,p0446,p0451-p0454,p0455,p0496
    Oxygen sensor p0133,p0134,p013a,p013b,p013e,p013f p0140,p1133,p2270,p2271
    Oxygen sensor heater p0030,p0036,p0053,p0054,p0135,p0141
    Egr p0011 or p0014

  3. #3
    Tuner in Training
    Join Date
    Jun 2017
    Posts
    10
    Can u update. Did it work