Powertrain, generic (extended)

P2B67 Coolant Pump D Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2B67 means the control line of coolant pump D sits too low, typically because it is shorted to ground or the driver stage sees excess current. No manufacturer publishes this code. Ford's comparable entries for pumps A and B (P2602, P261C) set when the smart driver in the engine computer reports an output fault, checked continuously above 11 V. Chafed insulation against body or engine, water in the connector and an internally shorted pump input are the usual suspects. Depending on how the output is wired, a ground short can leave the pump running nonstop or silence it completely. With the pump unplugged, measure the resistance of the signal wire to ground before replacing parts. Open circuit is P2B66, short to voltage P2B68; pump C has P26F5.

Likely causes

Control wire chafed through and shorted to ground
Moisture or corrosion in the pump connector
Control input inside the pump shorted

Symptoms

  • Warning lamp with stored code
  • Pump D runs constantly or not at all

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

P2B66P2B68P26F5P2DF5P261C

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