Powertrain, generic · Hybrid propulsion

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

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modeNo

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.

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

Symptoms

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

Repair estimate

DifficultyHardWorkshop job

Parts and labour€80–700

Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

hv battery pack coolant valve position sensorwiring harnessbms

Related codes

P0CE4 P0CE6 P0CE7 P0CE0 P0CE1

References: gsi.ext.gm.com, gsi.ext.gm.com, law.cornell.edu.