P1779
Engine Torque Delivered To TCM Signal
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–111 (est.)
Symptoms
- Incorrect gear shifting
- Hard shifts
- Switching delays
- Reduced performance
- Check Engine Light Illuminates
Causes
- Wiring problems between ECU and TCM
- Malfunction of torque sensors
- Software errors in ECU or TCM
- Mechanical problems in the transmission
- Problems with control modules
How to Fix
- Check wiring integrity between ECU and TCM
- Scan both modules for errors
- Update ECU/TCM software
- Check sensors related to torque measurement
- Carry out diagnostics of the mechanical part of the transmission