P0CE2Hybrid/EV Battery Pack Coolant Control Valve A Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0CE2 points to a ground short on the drive circuit of coolant control valve A. In the 2011 Chevrolet Volt and 2016 Cadillac ELR, GM's four-port battery valve is moved by a small motor with two driver lines. The hybrid controller sets P0CE2 when driver line 1 reads low while the valve should be travelling in reverse, with system voltage above 9 V (2011) or 10.2 V (2016); 90 failed samples out of 100 at 6.25 ms create a Type B code, so the MIL comes on after two trips. As long as it is active, the valve performance test is blocked. Typical findings are a wire chafed against the body, water in the connector or an internal short in the valve motor. With the valve stuck in its last position, battery cooling or heating may be restricted. Short to voltage is P0CE3, open circuit P0CDF.
- What you may notice
- MIL after two trips (GM)
- Valve does not move, battery thermal conditioning limited
- Likely causes
- LikelyDriver wire chafed through and shorted to ground
- PossibleWater or corrosion in the valve connector
- PossibleValve actuator motor internally shorted
- 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: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.