P0CEEHybrid/EV Electronics Coolant Temperature Sensor A Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Sensor A reports the coolant temperature in the loop that cools the hybrid power electronics. P0CEE is the general circuit code for it, used where a controller does not tell low from high. No manufacturer documents this code publicly; GM, for example, reports the same sensor only through P0CF0 (below 2 or 4 % of the reference voltage), P0CF1 (above 98 %) and the plausibility and noise checks P0CEF and P0CF2. CARB requires temperature inputs of inverter cooling systems to be checked for open circuits and for readings outside their valid band, so a controller may file an open or shorted sensor here instead. Because the system can no longer judge the coolant, it usually runs the pump harder and caps inverter and charging power as a precaution.
- What you may notice
- Malfunction indicator lamp or hybrid system warning
- Electronics coolant pump runs continuously
- Reduced drive or charging power as a precaution
- Likely causes
- LikelyLoose, corroded or water-soaked sensor connector
- PossibleDamaged signal or ground wire of the sensor
- PossibleFailed temperature sensor element
- 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: €40 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.