Powertrain, generic (extended)

P2CF4 Hybrid/EV Battery Pack Coolant Pump B Supply Voltage Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2CF4 is about the power feed of the second battery coolant pump, B: the pump or its control unit sees a supply voltage outside the permitted window, or none at all. Unlike the control-circuit codes P0E1A to P0E1C, which watch the command line, this code looks at the line that actually powers the motor, typically a fused 12 V feed plus ground. Ford's 2024 OBD summary handles the matching failure type (1C, supply voltage out of range) for its auxiliary coolant pumps, requiring a battery voltage of 11 V or more before a five-second check. No manufacturer publicly documents P2CF4 itself; the pump A counterpart P0C4B appears in Ford's 2020 hybrid bulletin 20-2345. Without pump B, battery cooling capacity falls, and charging or drive power may be reduced.

Likely causes

Blown fuse or faulty relay in the pump B feed
Corroded connector or poor ground on the pump B supply
Weak 12 V battery or DC/DC output dragging the supply down
Internal fault in the pump electronics misreading the supply

Symptoms

  • MIL or hybrid warning on
  • Pump B silent when commanded
  • Charging or drive power limited when the battery warms up

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€30–700
Time0.5–2.5 h

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

Parts involved

hybrid battery coolant pump bbattery pack coolant loop

Related codes

P0E1AP0E1EP2CF5P0C4BU0695

References: fordservicecontent.com, static.nhtsa.gov, law.cornell.edu.