P2B62Coolant 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
- P2B62 flags a supply voltage problem at coolant pump B, an electrically driven auxiliary pump with its own electronics. Ford's 2024 gasoline OBD summary files it as failure type 1C (supply voltage outside its permitted band) under base code P261A, in the check of pump B, which Ford defines as the high-temperature-loop auxiliary pump for component cooling #1. The check runs continuously, needs at least 11 V battery voltage and has a monitoring time of 5 seconds. Typical triggers are a blown fuse, a weak relay, corroded power or ground pins or a discharged battery. Faults on the control line are reported separately by P261A to P261D, the same supply fault on pump D by P2B69. With insufficient voltage the pump slows or stops, and the component it cools may overheat.
- What you may notice
- Warning lamp with stored code
- Auxiliary pump runs slowly or not at all
- Rising temperature of the component cooled by pump B
- Likely causes
- LikelyPump fuse blown or supply relay not closing properly
- PossibleCorroded or loose power or ground connection at the pump
- PossibleWeak battery or charging system fault lowering supply voltage
- RareVoltage detection inside the pump electronics faulty
- 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 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.