P2B6ACoolant Pump D Stuck/Stalled
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2B6A reports that coolant pump D is blocked or stalled: supply and command are present, yet the rotor does not come up to speed. No manufacturer documents the code publicly. Ford uses the identical failure type 71 (actuator stuck) for pump B as P2B63 and for pump A as P2B9C, and GM's patent US20160047374A1 explains how deviations of measured current and speed from expected values expose a faulty electric coolant pump. Seized bearings, an impeller jammed by debris or sludge, frozen coolant and a failed motor winding are typical. Before condemning the pump, confirm its supply (P2B69) and its control signal. Air in the pump points to P2B6C instead, overheated pump electronics to P2B6B. Pump C has the counterpart P26F8.
- What you may notice
- Warning lamp with stored code
- Pump D silent although commanded
- Overheating of the loop served by pump D
- Likely causes
- LikelyBearing seized or impeller jammed by debris or sludge
- PossibleMotor winding or pump electronics failed
- RareCoolant frozen because antifreeze concentration is too low
- 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: €150 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.