Powertrain, generic (extended)

P2B68 Coolant Pump D Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Control wire shorted to a battery or ignition feed
Moisture bridging pins in the connector
Fault in the pump electronics pulls the line up

Symptoms

  • Warning lamp with stored code
  • Pump D runs at a fixed speed or ignores commands

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–700
Time0.5–3 h

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

Parts involved

coolant pump dwiring harnessecm

Related codes

P2B66P2B67P26F6P2DF6P261D

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