P0CE5: Hybrid/EV Battery Pack Coolant Control Valve Position Sensor Circuit Range/Performance

P0CE5 means the position feedback of the battery coolant control valve is electrically valid, but the valve has not arrived where the controller sent it. In GM's 2016 Cadillac ELR tables the hybrid controller allows up to 22 s; if the feedback still shows a different position once the end-stop learn routine P1F56 has finished, 1280 of 1600 samples at 6.25 ms set a Type B code with the MIL on the second trip. In the 2011 Volt the same situation still fell under P0CE0. Causes include a valve that runs stiff because of deposits or cold, a weak actuator motor, a sensor that has moved away from its learned end stops, and air or low coolant in the loop. Battery cooling or heating then works less effectively. Circuit faults are P0CE6 and P0CE7, valve faults P0CE0 and P0CE1.

High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

Symptoms

MIL after two trips (GM)
Battery reaches its target temperature more slowly

Most likely causes

Valve stiff from deposits or low temperature
Actuator motor weak or gearing worn
Position sensor drifted from learned end stops
Air or low coolant in the battery circuit

What to check, in order

Start with the simplest. You can tick off each step.

Read the codes with a hybrid-compatible scanner and write down the freeze frame data
Compare the reading with other engine data while varying the engine speed.
Make sure the battery cooling air intake is clean
Check the 12 V auxiliary battery, which can also trigger warnings
Leave any high-voltage measurements to a specialized repair shop

Good to know

Repair difficulty: hard
It affects emissions.

What each character of P0CE5 means

P: Powertrain: engine and transmission
0: Generic code: same on every make
C: Subsystem depends on the code range
E5: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0CE5?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0CE5?

The most common causes are: valve stiff from deposits or low temperature; actuator motor weak or gearing worn; position sensor drifted from learned end stops.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.