Powertrain, generic · Hybrid propulsion

P0CE3 Hybrid/EV Battery Pack Coolant Control Valve A Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0CE3 is the short-to-voltage fault of the coolant control valve A drive circuit. GM tests it on the motor-driven four-port battery valve of the 2011 Chevrolet Volt and 2016 Cadillac ELR: driver line 1 reads high while the valve should be stopped or moving forward. System voltage must exceed 9 V or 10.2 V, and 90 of 100 samples at 6.25 ms set a Type B code with the MIL on the second trip. Unlike P0CE2, the check is made in the other direction of travel, which helps tell which condition was detected. Pinched wires touching a supply line, harness damage near the battery or a faulty driver stage in the module are typical causes. Battery temperature control then works only in a fallback mode. Short to ground is P0CE2, mechanical sticking P0CE0 and P0CE1.

Likely causes

Driver wire pinched against a supply line
Harness damage near the battery or valve
Driver stage in the control module faulty

Symptoms

  • MIL after two trips (GM)
  • Battery heating or cooling in fallback mode

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 awiring harnessbms

Related codes

P0CE2P0CDFP0CE1P0D1E

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