Powertrain, generic · Hybrid propulsion

P0CE7 Hybrid/EV Battery Pack Coolant Control Valve Position Sensor Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0CE7 is the high-side fault of the battery coolant control valve position feedback. GM sets it when the signal exceeds 95 % of the reference voltage in the 2011 Chevrolet Volt (40 of 50 samples at 100 ms) or 72 % in the 2016 Cadillac ELR (640 of 800 samples at 6.25 ms), in both cases with system voltage above 9 V or 10.2 V and rated Type B, so the MIL lights on the second trip. The ELR value sits just above the highest end stop it accepts while learning (about 69.5 %). An interrupted sensor ground, a signal line shorted to the reference or to battery voltage, or a worn sensor track are typical. The coolant path can then no longer be confirmed, and thermal conditioning may be restricted. The low counterpart is P0CE6.

Likely causes

Sensor ground wire interrupted
Signal wire shorted to reference or battery voltage
Worn sensor track in the actuator

Symptoms

  • MIL after two trips (GM)
  • Valve position shown near 100 % in live data

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–600
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

P0CE6P0CE4P0CE5P0CE8

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