P0EF6Drive Motor C Temperature Sensor Over Temperature
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0EF6 is not an electrical fault: the drive motor C temperature sensor delivers a believable value, but that value has passed the motor's protection limit. No manufacturer documents P0EF6 publicly. For motor B on the 2016 Cadillac ELR, GM sets P0A35 when the temperature exceeds 149 °C and does not fall back below a reset threshold, Type A, and only while the range check P0A31 is passing. Ford's 2019 hybrids set P0A2F at a coil temperature above 140 °C or transmission oil above 115 °C. Causes are mostly on the cooling side, such as low coolant or oil, a failed pump or a clogged cooler, but long full-load phases or a winding with shorted turns also heat the motor. Torque of motor C is cut until it cools; sensor circuit faults belong to P0EF1 to P0EF5.
- What you may notice
- Clearly reduced power until the motor has cooled down
- Warning about drive system overheating
- MIL on (manufacturer-dependent)
- Likely causes
- LikelyLow coolant or oil level, or air in the motor cooling circuit
- PossibleFailed coolant or oil pump, or clogged cooler
- PossibleLong full-load phases such as towing, track use or steep climbs
- RareShorted turns in the stator winding generating extra heat
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €50 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.