P2C67Hybrid/EV Electronics Coolant Pump A Overspeed
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- With P2C67 the electronics coolant pump A runs faster than commanded. A centrifugal pump speeds up as soon as it loses load, so air in the loop is the leading suspect, followed by a loose impeller or a faulty speed signal. Mercedes logs the related dry-run code P2B2A7A on the GLE/GLS 167 with M177 V8 and 48 V system: air in the low-temperature loop sends the 15 W pump into an emergency dry-run mode, and the cluster shows a yellow coolant message. A Pierburg patent detects dry running by letting the motor coast after a defined energy pulse and counting rotor turns. No manufacturer documents P2C67 itself. Ford's 2024 summary treats overspeed/dry run (B1) as its own pump fault type. Underspeed is P2C66, dry run P2B2A.
- What you may notice
- Coolant or drive system warning in the cluster
- Churning or gurgling noise from the pump
- Reduced power when electronics temperatures climb
- Likely causes
- LikelyAir in the electronics loop after service or from a leak
- PossibleLow coolant level in the low-temperature reservoir
- RareImpeller slipping on the shaft or broken
- RareImplausible speed feedback from the pump electronics
- 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: €80 – €1,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.