Powertrain, generic · Hybrid propulsion

P0C48 Hybrid/EV Battery Pack Coolant Pump A Control Circuit Low

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P0C48 narrows a fault on the control line of battery coolant pump A down to a signal that stays too low, as caused by a short to ground or a driver output that cannot pull the line up. Ford lists the code for the 2020 Explorer, Police Interceptor Utility and Lincoln Aviator with the hybrid powertrain. Bulletins 20-2293 and 20-2345 group it with P0C49, P0C4A, P0C4B, P0CFF, P2B29 and other pump and battery codes that light the MIL and are stored in the PCM; the cause is the software of the battery energy control module, which is reprogrammed. Other makers, GM for instance, cover the same failure inside the broader code P0C47. CARB requires output components of battery thermal management to be checked for circuit faults. If the pump really stops, battery power is limited.

Likely causes

Battery control module software (Ford/Lincoln 2020 hybrids, TSB 20-2345)

Pump control wire shorted to ground

Internal fault in the pump electronics pulling the line low

Symptoms

MIL on
Hybrid system message, battery power possibly limited

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€50–700

Time0.5–2.5 h

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

Parts involved

hv battery pack coolant pump awiring harnessbms

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