P2E7AHybrid/EV Electronics Coolant Pump C Overspeed
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- P2E7A means the third electronics coolant pump spins faster than the speed it was given. A centrifugal pump that draws air instead of liquid loses its load and races, so a low coolant level, a leak or a poorly bled loop come first, a slipping impeller or false speed feedback later. No manufacturer documents P2E7A. GM's 2019 hybrid tables show how such a fault is caught on its electronics pump: P19FC fails once filtered feedback speed exceeds the command by a calibrated margin, and with the pump switched off a reported speed above 250 rpm in 8 of 10 s also counts. HELLA's MP150e pump detects dry running from speed and start current, stops and stores a fault. Mercedes ties P2B2A7A in the 167 series to air and leaks; Ford keeps overspeed/dry run as fault type B1. Performance of pump C is P2E79.
- What you may notice
- Coolant or hybrid system warning, possibly MIL
- Coolant reservoir level dropping, traces of leakage
- Pump runs loud or churns; power or charging may be reduced
- Likely causes
- LikelyCoolant level low or air pocket at the pump inlet
- PossibleLeak or defective seal in the electronics coolant loop
- RareImpeller loose on its shaft or broken
- RareFaulty speed feedback from the pump electronics
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €1,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.