OBD-II code · Powertrain (generic)
P0E4F Motor Electronics Coolant Pump A Control Circuit Intermittent/Erratic
The motor electronics coolant pump A control signal drops out or jumps intermittently. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P0E4F?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyConnector not seated
- PossibleNoisy ground reference
- Less likelyConnector with intermittent contact under vibration
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Motor Electronics Coolant Pump A, Wiring Harness, Hybrid Control Module
Related codes
- P0E50Motor Electronics Coolant Pump B Control Circuit Intermittent/Erratic
- P0E4CHybrid/EV Battery Pack Voltage Sense F Circuit High
- P0E4DHybrid/EV Battery Pack Voltage Sense F Circuit Intermittent/Erratic
- P0E4EEngine Failed to Crank
- P0E51DC/DC Converter Current Sensor A Circuit
- P0E52DC/DC Converter Current Sensor A Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.