P077E code meaning
Transmission Fluid Temperature Measurement System Multiple Sensor Correlation
Powertrain system Generic code P07xx codes Check engine light
What P077E means
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.
P077E at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor1 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P077E
- Transmission warning, possibly check engine light
- Converter clutch applies late or not at all
- Harsh cold shifts
Common causes of P077E
- Most likelyOne temperature sensor drifting (aged NTC)
- PossibleContact resistance at a sensor connector or wire
- Less likelyFluid level too low (sensor not wetted)
- Less likelyModule or software
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Transmission fluid temperature sensorSensor wiringTransmission control module
What each part of P077E means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7 | Area: transmission. |
| 7E | The exact fault in that area. |
What to do next
- Note P077E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P077E
What does P077E mean?
P077E means "Transmission Fluid Temperature Measurement System Multiple Sensor Correlation". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P077E?
Drive gently and only to a workshop. With P077E the car can go into limp mode (reduced power) to protect itself.
Will P077E fail an emissions test?
Yes, it can. P077E is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P077E to fix?
Difficulty: medium. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P077E clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.