Powertrain, generic (extended)

P2CB5 Charge Air Cooler Coolant Pump B Control Module Overtemperature

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2CB5 is raised by the electronics inside charge air cooler pump B when their temperature exceeds the limit; the pump then throttles back or stops to protect itself. No manufacturer documents P2CB5 publicly. Ford's 2024 gasoline OBD summary lists the same fault type, 98 (system over temperature), for its auxiliary coolant pump B (P2B64), monitored continuously from 11 V. Ford's 2019 hybrid summary shows the principle on the LIN-linked engine coolant pump (P26D2): the pump sends its module temperature and the PCM flags readings above 130 °C. The board is cooled by the liquid passing through, so overheating mostly follows a dry run, air in the pump, a stiff impeller or a hot mounting spot. Check level and bleeding first; air alone often appears as P2CB1.

Likely causes

Pump running dry or partly in air because of low coolant
Stiff impeller making the motor draw more current
Pump mounted close to hot exhaust or turbo parts
Ageing power stage in the pump electronics

Symptoms

  • MIL on
  • Pump B slows down or switches off, charge air gets warmer
  • Reduced power in hot weather or on long climbs

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€30–800
Time0.5–2.5 h

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

Parts involved

cac coolant pump bcac coolant loop

Related codes

P2BC3P2CB1P2CB3P2CB4P2B64

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