Powertrain, generic (extended)

P2DF5 Coolant Pump E Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2DF5 means the command line of coolant pump E sits too low, typically shorted to ground, so the module's driver cannot pull it up to the commanded level. No manufacturer documents this code publicly. In Ford's 2024 gasoline OBD summary the matching fault type is 11 (circuit low), again flagged by the smart driver for pumps A and B, continuously above 11 V. Because a PWM pump reads duty cycle, a line held at ground can mean zero duty; depending on the pump design this is read as stop, as maximum speed or as a fault state. CARB requires output components to be checked for shorts as well as for proper response. Look for chafed insulation against body or engine parts and water in the connector. The open circuit is P2DF4, a short to voltage P2DF6, the pump power feed P2DFA.

Likely causes

Command wire chafed through and shorted to ground
Moisture or corrosion bridging the command pin to ground
Internal short in the pump's control input
Output stage of the commanding module defective

Symptoms

  • Warning lamp on
  • Pump stopped or stuck at one speed
  • Rising temperature of the component served by pump E

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–600
Time0.3–2.5 h

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

Parts involved

coolant pump ewiring harnessecm

Related codes

P2DF4P2DF6P2DFAP2D26

References: fordservicecontent.com, law.cornell.edu, bosch-mobility.com.