P0E1BHybrid/EV Battery Pack Coolant Pump B Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0E1B narrows a pump B command fault down to a level below the expected window, normally because the control or PWM wire has a ground fault, or because a driver that cannot raise it. No manufacturer documents P0E1B publicly. The nearest documented relative is P0C48 for pump A, which Ford listed for the 2020 Explorer, Police Interceptor Utility and Lincoln Aviator hybrids and traced to battery energy control module software that is reprogrammed. A software cause of that kind is worth ruling out first before cutting into the harness. Physically, a low reading often comes from insulation rubbed through on a bracket or from coolant wicking into the connector. CARB wants each thermal management output checked for such faults. If pump B stops as a result, the loop it serves loses flow. Open circuit is P0E1A, short to voltage P0E1C.
- What you may notice
- Check engine light on
- Pump B does not run
- Power limited when the components it cools get hot
- Likely causes
- LikelyPump B control or PWM wire shorted to ground
- PossibleCoolant or water in the pump connector
- PossibleControl module software fault, as seen by Ford on the pump A sibling
- RareInternal short at the pump B control input
- 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 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.