• Ford PCM Acts Up in Cold Weather

    Some 2017 Ford C-MAX/Fusion Hybrid/Energi vehicles may exhibit an illuminated MIL with DTC P0071 stored in the PCM. This DTC can be set after the vehicle is stored in a warm location for several hours and then driven on a cold day.
    July 19, 2023
    Ford
    Reprogram the PCM to the latest calibration using IDS release 104.04 or higher.
    Reprogram the PCM to the latest calibration using IDS release 104.04 or higher.

    Some 2017 Ford C-MAX/Fusion Hybrid/Energi vehicles may exhibit an illuminated MIL with DTC P0071 stored in the PCM. This DTC can be set after the vehicle is stored in a warm location for several hours and then driven on a cold day. Under these conditions the PCM may see a temperature sensor concern when it first compares the ambient air temperature (AAT) sensor to other engine temperature sensors and set the DTC.

    Reprogram the PCM to the latest calibration using IDS release 104.04 or higher.

    About the Author

    Information courtesy of Mitchell 1

    Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

    Sign up for Vehicle Service Pros eNewsletters

    Voice Your Opinion!

    To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!