P2CF4Hybrid/EV Battery Pack Coolant Pump B Supply Voltage Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2CF4 is about the power feed of the second battery coolant pump, B: the pump or its control unit sees a supply voltage outside the permitted window, or none at all. Unlike the control-circuit codes P0E1A to P0E1C, which watch the command line, this code looks at the line that actually powers the motor, typically a fused 12 V feed plus ground. Ford's 2024 OBD summary handles the matching failure type (1C, supply voltage out of range) for its auxiliary coolant pumps, requiring a battery voltage of 11 V or more before a five-second check. No manufacturer publicly documents P2CF4 itself; the pump A counterpart P0C4B appears in Ford's 2020 hybrid bulletin 20-2345. Without pump B, battery cooling capacity falls, and charging or drive power may be reduced.
- What you may notice
- MIL or hybrid warning on
- Pump B silent when commanded
- Charging or drive power limited when the battery warms up
- Likely causes
- LikelyBlown fuse or faulty relay in the pump B feed
- PossibleCorroded connector or poor ground on the pump B supply
- PossibleWeak 12 V battery or DC/DC output dragging the supply down
- RareInternal fault in the pump electronics misreading the supply
- 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: €30 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.