P0CC2: Drive Motor A Coolant Pump Control Circuit Range/Performance

P0CC2 judges whether the pump for drive motor A actually moves coolant, not only whether its wiring is intact. GM's 2013 eAssist table 13OBDG05C infers flow from temperature: when the model predicts more than 17 °C between the jacket coolant of the motor generator and the coolant reaching the loop sensor, a running pump should make the sensor warm up quickly. If its rate of change stays at 0.25 °C per second or less 20 s after the pump was switched on, the test fails, Type B, two trips, with over 10 V supply. The check is blocked by pump circuit codes P0CC1/P0CC3/P0CC4, by the loop sensor codes P0CBD to P0CBF and by stator sensor codes P0A2B to P0A2D. A seized or air-locked pump, low coolant or a blocked hose are typical; CARB section (e)(15.2.2) requires such functional checks of output components.

Symptoms

• Check-engine lamp
• Electric assist reduced as the motor generator heats up

Most likely causes

• Air in the motor generator cooling loop, often after service
• Worn or seized pump impeller
• Low coolant level or kinked or blocked hose

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. Compare the reading with other engine data while varying the engine speed.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. Leave any high-voltage measurements to a specialized repair shop

Good to know

• Repair difficulty: medium
• It can trigger limp mode.
• It affects emissions.

What each character of P0CC2 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• C: Subsystem depends on the code range
• C2: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0CC2?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0CC2?

The most common causes are: air in the motor generator cooling loop, often after service; worn or seized pump impeller; low coolant level or kinked or blocked hose.

Related codes

• P0CC1Drive Motor A Coolant Pump Control Circuit/Open
• P0CC3Drive Motor A Coolant Pump Control Circuit Low
• P0CC4Drive Motor A Coolant Pump Control Circuit High
• P0CBDDrive Motor A Coolant Temperature Sensor Circuit Range/Performance
• P0A2FDrive Motor A Over Temperature
• P0C73Motor Electronics Coolant Pump A Control Performance

Sources

• gsi.ext.gm.com: 13OBDG05C Hybrid Diagnostics
• law.cornell.edu: 13 CCR 1968.2

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.