P077ETransmission Fluid Temperature Measurement System Multiple Sensor Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P077E is a plausibility check between several fluid temperature readings – for example sensors A and B, sump and valve body, or the module's internal temperature. If they differ by more than allowed after a settling time, such as a long stop, the code sets, without being able to blame a single sensor. No manufacturer document available to us uses it: GM checks each sensor alone (P0711, with the module temperature on the 6T70), and Ford has no multi-sensor check. A substitute value then limits converter clutch and shift adaption.
- What you may notice
- Transmission warning, possibly check engine light
- Converter clutch applies late or not at all
- Harsh cold shifts
- Likely causes
- LikelyOne temperature sensor drifting (aged NTC)
- PossibleContact resistance at a sensor connector or wire
- RareFluid level too low (sensor not wetted)
- RareModule or software
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.