P0CEAHybrid/EV Electronics Coolant Pump A Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Here the pump circuit is electrically intact, yet the coolant it should move does not seem to arrive. GM documents it in the VICM tables of 2014 and 2016, the latter explicitly for the Cadillac ELR: with the pump enabled above 30 % speed for more than 300 s, the controller compares the power electronics coolant temperature with the temperature of the high-voltage charger. A gap larger than a calibrated value, separate for charging and for driving, or a charger hotter than 60 °C for over 600 s while charging counts as a failure; 32 of 40 samples at 250 ms set the code, Type B, two trips. Circuit faults (P0CE9, enable line) block the test. Weak flow from air in the loop, low coolant or a worn pump is the usual background; charging and drive power are cut back to protect the electronics.
- What you may notice
- Malfunction indicator lamp or hybrid system message
- Charging slows down or stops, especially in hot weather
- Reduced propulsion power during long or demanding drives
- Likely causes
- LikelyAir trapped in the power electronics coolant loop after service or a leak
- PossibleLow coolant level in the electronics loop reservoir
- PossibleWorn or partly blocked pump delivering too little flow
- RareSkewed coolant or charger temperature signal distorting the comparison
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.