OBD-II code · Powertrain (generic)

P0CEF Hybrid/EV Electronics Coolant Temperature Sensor A Circuit Range/Performance

The ECM detects a range/performance fault on the hybrid/ev electronics coolant temperature sensor a circuit. Reading cannot be used reliably for control.

Is it safe to drive with P0CEF?

The car may go into limp mode (reduced power). Get it diagnosed before a long trip.

Common causes

  • Most likelySensor characteristic drifted
  • PossibleSensor mounting displaced
  • Less likelySensor element aged beyond calibration window

Repair at a glance

Difficulty
Easy
DIY friendly
Best left to a mechanic
Typical labour
0.5–3 h
Emissions test
Usually unaffected
Parts involved
Hybrid Electronics Coolant Temp Sensor A, Wiring Harness, Hybrid Control Module

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.