P0CC4 code meaning
Drive Motor A Coolant Pump Control Circuit High
Powertrain system Generic code P0Cxx codes Check engine light
What P0CC4 means
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.
P0CC4 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P0CC4
- Check-engine lamp after two trips
- Pump silent when it should run
Common causes of P0CC4
- Most likelyControl wire shorted to a voltage-carrying line
- PossibleJammed pump drawing excess current
- Less likelyWater ingress in the pump connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor a coolant pumpWiring harnessHybrid control module
What each part of P0CC4 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| C4 | The exact fault in that area. |
What to do next
- Note P0CC4 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0CC4
What does P0CC4 mean?
P0CC4 means "Drive Motor A Coolant Pump Control Circuit High". P0CC4 stands for a control line of the drive motor A coolant pump that is held at supply voltage or overloaded. It is a generic code, so it means the same on every make.
Is it safe to drive with P0CC4?
Drive gently and only to a workshop. With P0CC4 the car can go into limp mode (reduced power) to protect itself.
Will P0CC4 fail an emissions test?
Yes, it can. P0CC4 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0CC4 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P0CC4 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.