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Lost Communication with TCM

Mo1992
Mo1992
in Ford Focus Club

Featured Replies

Hi

Hoping someone can help. My car randomly shut down in the middle of the road. It’s stuck in ‘P’ and the gear indicator is flashing. The electrics come on, but there’s no engine power. I’m getting loads of errors on the dash like ‘No Pre-Collision Sensor,’ ‘No Parking Assist,’ etc. I remember someone else had a similar issue, but I’m not sure what they did to resolve it. Has anyone experienced this and found a solution? It’s at a local garage, but they’re scratching their heads too.

Model: 1.5Tcdi 2020 16000 miles. 

U0101: Lost Communication with TCM

U0100 0100: Invalid Data Recieved from ECM / Power control module A

  • Quote
    • Sad 1


    Fit a new battery, reset modules, clear DTCs

  • Quote
    • Like 2
    • 7 months later...

    @Mo1992 did you have this issue fixed, I have similar issues on the 8 speed automatic in my Focus St Line

  • Quote
    On 4/9/2025 at 11:27 AM, DaveT70 said:

    Fit a new battery, reset modules, clear DTCs

     

  • Quote
    • Like 1

    I had similar issues with my 2.0 ecoblue auto and that was a broken wire on the gearbox. 

    Had a recall done 5 years ago to prevent an issue with wires rubbing on the gearbox, suspect the dealer may not have fixed it properly. 

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