Powertrain, generic (extended)

P2B6A Coolant Pump D Stuck/Stalled

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Bearing seized or impeller jammed by debris or sludge
Motor winding or pump electronics failed
Coolant frozen because antifreeze concentration is too low

Symptoms

  • Warning lamp with stored code
  • Pump D silent although commanded
  • Overheating of the loop served by pump D

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€150–900
Time1–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

coolant pump dwiring harnessecm

Related codes

P2B69P2B6BP2B6CP2B63P26F8P2DF9

References: law.cornell.edu, fordservicecontent.com, patents.google.com.