Powertrain, generic · Hybrid propulsion

P0CC3 Drive Motor A Coolant Pump Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0CC3 indicates that the control line of the drive motor A coolant pump is pulled to ground. GM lists it for the 2013 eAssist cars in table 13OBDG05C: the hardware status of the output driver signals a low-circuit fault, and 20 of 25 samples at 250 ms with the pump commanded off and the vehicle in run/crank fail the test, Type B, so the MIL is lit after the second trip. Typical are chafed insulation where the harness passes brackets or the engine, or a pump with an internal short. Depending on how the driver stage is built, a grounded line can also leave the pump running permanently or stop it, so either constant pump noise or missing cooling is possible. Compared with the open-circuit code P0CC1 and the short-to-voltage code P0CC4, the repair focuses on finding the point of ground contact.

Likely causes

Chafed control wire touching ground
Internal short in the pump
Faulty output stage in the control module

Symptoms

  • Check-engine lamp after two trips
  • Pump running constantly or not at all
  • Reduced electric assist

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

P0CC4P0CC1P0CC2P0CBC

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