P0CEB code meaning
Hybrid/EV Electronics Coolant Pump A Control Circuit Low
Powertrain system Generic code P0Cxx codes Check engine light
What P0CEB means
The control line of the electronics coolant pump sits at too low a level, typically because it is shorted to ground or the driver cannot pull it up. No manufacturer publishes setting criteria for this code. GM's 2019 HPC2 table names P0CEB only as a blocking code alongside P0CE9, P0CEC and P0CED: while any of them is active, the plausibility test of the electronics coolant temperature sensor (P0CEF) does not run. GM folds a grounded line into P0CE9 in other years, so how P0CEB is used depends on the controller. CARB requires inverter cooling components to be checked for circuit faults. The counterpart for a line stuck high is P0CEC. A shorted line can keep the pump from running, which lets the inverter and charger loop overheat and leads to power limits.
P0CEB at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0CEB
- Malfunction indicator lamp or hybrid warning
- Electronics coolant pump does not run
- Power or charging limited as electronics temperatures rise
Common causes of P0CEB
- Most likelyControl wire chafed through and touching body ground
- PossiblePump control input shorted internally
- PossibleWater or corrosion in the pump connector bridging pins to ground
- Less likelyFaulty output stage in the controlling module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hybrid electronics coolant pump aWiring harnessHybrid control module
What each part of P0CEB 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. |
| EB | The exact fault in that area. |
What to do next
- Note P0CEB 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 P0CEB
What does P0CEB mean?
P0CEB means "Hybrid/EV Electronics Coolant Pump A Control Circuit Low". The control line of the electronics coolant pump sits at too low a level, typically because it is shorted to ground or the driver cannot pull it up. It is a generic code, so it means the same on every make.
Is it safe to drive with P0CEB?
Drive gently and only to a workshop. With P0CEB the car can go into limp mode (reduced power) to protect itself.
Will P0CEB fail an emissions test?
Yes, it can. P0CEB 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 P0CEB to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P0CEB clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.