P0CE8Hybrid/EV Battery Pack Coolant Control Valve Position Sensor Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0CE8 stands for a valve position feedback that drops out or jumps briefly while the hard low and high limits are not violated long enough to set P0CE6 or P0CE7. Such patterns come from loose pins at the valve plug, a cracked solder joint or a worn sensor track that loses contact at certain angles. GM's 2011 Volt catches a related symptom inside P0CE0: when the summed noise of the feedback exceeds 12 %, the valve performance test fails (8 of 10 samples at 1 s). No manufacturer publicly documents P0CE8 itself; CARB's requirement to monitor battery thermal management inputs applies. Effects range from a brief warning to temporarily limited charging, often with no lasting complaint. Watching the feedback in live data while moving the connector usually reveals the fault.
- What you may notice
- Occasional warning lamp that may go out again
- Jumping valve position in live data
- Likely causes
- LikelyLoose or corroded pin in the valve connector
- PossibleWorn sensor track losing contact at certain positions
- RareCracked solder joint inside the actuator
- 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: €50 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.