Powertrain, generic · Hybrid propulsion

P0CC4 Drive Motor A Coolant Pump Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0CC4 stands for a control line of the drive motor A coolant pump that is held at supply voltage or overloaded. In GM's 2013 eAssist table 13OBDG05C the output driver reports a high-circuit status, and unlike the open and low checks this one runs while the pump is commanded on; 20 failures in 25 samples at 250 ms in run/crank set a Type B code, two trips. Sampling with the output switched on lets the driver recognise excess current or a voltage that should not be there. Causes include a control wire chafed against a battery-positive feed, a pump drawing too much current because of a jammed rotor, or water in the connector. The output stage normally switches off to protect itself, so the pump stops and the motor generator loses active cooling; P0CC3 and P0CC1 are the other circuit codes of this pump.

Likely causes

Control wire shorted to a voltage-carrying line
Jammed pump drawing excess current
Water ingress in the pump connector

Symptoms

  • Check-engine lamp after two trips
  • Pump silent when it should run

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–600
Time0.5–2.5 h

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

Parts involved

drive motor a coolant pumpwiring harnesshybrid control module

Related codes

P0CC3P0CC1P0CC2P0CBC

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