P2B68Coolant Pump D Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2B68 flags a control line for coolant pump D that reads too high: it touches a voltage source or is pulled up while the driver should switch it. No manufacturer documents the code publicly. In Ford's 2024 summary the matching pump A and B codes (P2603, P261D) rest on the same principle, with the smart driver in the engine computer reporting an output circuit fault during a continuous check above 11 V. Likely causes are a wire rubbed through onto a battery-fed conductor, moisture bridging pins or a fault inside the pump electronics. With a line stuck high the pump may run at a fixed speed or ignore commands. Section (e)(15) of CARB 13 CCR 1968.2 wants this kept apart from the open and low faults. Open circuit is P2B66, ground short P2B67, pump E uses P2DF6.
- What you may notice
- Warning lamp with stored code
- Pump D runs at a fixed speed or ignores commands
- Likely causes
- LikelyControl wire shorted to a battery or ignition feed
- PossibleMoisture bridging pins in the connector
- RareFault in the pump electronics pulls the line up
- 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: €50 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.