P2CC8 code meaning
Coolant Pump Speed Sensor Circuit
Powertrain system Generic code P2Cxx codes Check engine light
What P2CC8 means
Some engines measure how fast a coolant pump turns with a dedicated speed sensor, for instance on a pump that can be engaged and released or on an electric pump read back by the controller. P2CC8 is the general fault of that sensor's circuit: the signal is absent or cannot be used, without the controller deciding whether it is too low or too high. No manufacturer documents P2CC8 publicly. GM's patent US20160047374A1 describes how a measured pump speed, compared with the target, lets the controller diagnose an electric main coolant pump; Audi's patent US8915127B2 shows that without such a signal a switchable pump can only be judged indirectly through cylinder head temperature. CARB requires monitoring of coolant flow devices other than a thermostat. Expect a MIL and a default pump state.
P2CC8 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2CC8
- MIL on
- Coolant pump held in a default state, warm-up may change
Common causes of P2CC8
- Most likelyFailed speed sensor delivering no usable signal
- PossibleDamaged wiring or loose connector at the sensor
- Less likelyMissing reference voltage or ground for the sensor
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Coolant pump speed sensorWiring harnessECM
What each part of P2CC8 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| C | Area: hybrid propulsion. |
| C8 | The exact fault in that area. |
What to do next
- Note P2CC8 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 P2CC8
What does P2CC8 mean?
P2CC8 means "Coolant Pump Speed Sensor Circuit". Some engines measure how fast a coolant pump turns with a dedicated speed sensor, for instance on a pump that can be engaged and released or on an electric pump read back by the controller. It is a generic code, so it means the same on every make.
Is it safe to drive with P2CC8?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2CC8 fail an emissions test?
Yes, it can. P2CC8 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 P2CC8 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will P2CC8 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.