Results 1 to 2 of 2

Thread: 2019 Mustang flex fuel low alcohol content and Error codes

  1. #1
    Potential Tuner
    Join Date
    Nov 2017
    Posts
    8

    2019 Mustang flex fuel low alcohol content and Error codes

    Good afternoon guys. The mustang I tuned didn't see the higher ethanol content after I filled up and now it has thrown codes P0171 P0174. I also got a long term fuel trim of 32 and 25. Should I turn off long term? My alcohol content is at 9% when It should be somewhere near 75 based on my computation. attached is the file for your suggestions. Thanks very flexv7maf452blazee85487whpFlexV7noerrornvram.hptflexv7maf452blazee85487whpFlexV7noerrornvram.hpt much!

  2. #2
    Tuner in Training
    Join Date
    Jun 2016
    Posts
    11
    I would increase ECM 21364 to at least 0.01 AFR/s for the maximum update rate, having it at 0 can cause it to not mature. Does the AFR learned PID in scanner show it is matured or still learning? If it's learned try resetting KAM and see if it matures.