P0CEE code meaning
Hybrid/EV Electronics Coolant Temperature Sensor A Circuit
Powertrain system Generic code P0Cxx codes Check engine light
What P0CEE means
Sensor A reports the coolant temperature in the loop that cools the hybrid power electronics. P0CEE is the general circuit code for it, used where a controller does not tell low from high. No manufacturer documents this code publicly; GM, for example, reports the same sensor only through P0CF0 (below 2 or 4 % of the reference voltage), P0CF1 (above 98 %) and the plausibility and noise checks P0CEF and P0CF2. CARB requires temperature inputs of inverter cooling systems to be checked for open circuits and for readings outside their valid band, so a controller may file an open or shorted sensor here instead. Because the system can no longer judge the coolant, it usually runs the pump harder and caps inverter and charging power as a precaution.
P0CEE at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0CEE
- Malfunction indicator lamp or hybrid system warning
- Electronics coolant pump runs continuously
- Reduced drive or charging power as a precaution
Common causes of P0CEE
- Most likelyLoose, corroded or water-soaked sensor connector
- PossibleDamaged signal or ground wire of the sensor
- PossibleFailed temperature sensor element
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hybrid electronics coolant temp sensor aWiring harnessHybrid control module
What each part of P0CEE 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. |
| EE | The exact fault in that area. |
What to do next
- Note P0CEE 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 P0CEE
What does P0CEE mean?
P0CEE means "Hybrid/EV Electronics Coolant Temperature Sensor A Circuit". Sensor A reports the coolant temperature in the loop that cools the hybrid power electronics. It is a generic code, so it means the same on every make.
Is it safe to drive with P0CEE?
Drive gently and only to a workshop. With P0CEE the car can go into limp mode (reduced power) to protect itself.
Will P0CEE fail an emissions test?
Yes, it can. P0CEE 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 P0CEE to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will P0CEE clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.