P0CE2 code meaning
Hybrid/EV Battery Pack Coolant Control Valve A Control Circuit Low
Powertrain system Generic code P0Cxx codes Check engine light
What P0CE2 means
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.
P0CE2 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0CE2
- MIL after two trips (GM)
- Valve does not move, battery thermal conditioning limited
Common causes of P0CE2
- Most likelyDriver wire chafed through and shorted to ground
- PossibleWater or corrosion in the valve connector
- PossibleValve actuator motor internally shorted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery pack coolant valve aWiring harnessBms
What each part of P0CE2 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| E2 | The exact fault in that area. |
What to do next
- Note P0CE2 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0CE2
What does P0CE2 mean?
P0CE2 means "Hybrid/EV Battery Pack Coolant Control Valve A Control Circuit Low". P0CE2 points to a ground short on the drive circuit of coolant control valve A. It is a generic code, so it means the same on every make.
Is it safe to drive with P0CE2?
Drive gently and only to a workshop. With P0CE2 the car can go into limp mode (reduced power) to protect itself.
Will P0CE2 fail an emissions test?
Yes, it can. P0CE2 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0CE2 to fix?
Difficulty: hard. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P0CE2 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.