Powertrain, generic · Hybrid propulsion

P0CC0 Drive Motor A Coolant Temperature Sensor Circuit Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0CC0 is meant for a coolant temperature signal of drive motor A that drops out or jumps for short moments. No manufacturer documents this code publicly. GM's 2013 eAssist table, the most detailed public source for this sensor, monitors it only with P0CBD for plausibility and P0CBE/P0CBF for out-of-range values; Volvo and Polestar report P0CBC with failure type 62. CARB section (e)(15.2.1) asks for circuit and range faults of inputs to be detected, and (e)(15.2.3)(B)(ii) extends this to the cooling of the inverter. A sporadic code typically stems from a loose terminal, a chafed wire that touches metal only on bumps, or water in the connector. Since the reading normally recovers, the lamp may go out again; live data recorded during a drive help to catch the moment of the fault.

Likely causes

Loose or spread terminal in the sensor connector
Chafed wire making contact only on bumps
Moisture in the connector

Symptoms

  • Warning lamp that appears and disappears
  • Jumping coolant temperature value in live data

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–400
Time0.5–2.5 h

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

Parts involved

drive motor a coolant temp sensorwiring harnesshybrid control module

Related codes

P0CBCP0CBDP0CBEP0CBFP0A2E

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