Powertrain, generic (extended)

P2BC1 Charge Air Cooler Coolant Pump A Stuck/Stalled

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P2BC1 means the electric pump that circulates coolant through the charge air cooler loop is powered, but its rotor will not turn or stops under load; the pump electronics see high current at little or no speed and report this to the engine module. Audi documents the code as P2BC100 in bulletin 2080825 for 2025–2026 A5/S5 and Q5 models with engine codes DXBA and DXCA: after the car stood unused longer than two months, pump V188 may stick. The MIL and a reduced-power message appear. If the pump runs again on an actuator test and the entry was only intermittent, it is cleared, otherwise the pump is replaced. FCA lists P2BC1-00 on 2018–2019 Alfa Romeo Giulia and Stelvio 2.0 turbos among codes addressed by a software flash. Over- and underspeed of the same pump are P2B83 and P2B84.

Likely causes

Rotor stuck after a long standstill (Audi bulletin 2080825)

Debris, deposits or a worn bearing blocking the impeller

Engine module software needing an update (FCA bulletins for Giulia/Stelvio)

Ice in the loop due to insufficient antifreeze

Symptoms

Check engine light, often with a reduced-power message
Hot charge air and less power under load
No running noise from the pump during an actuator test

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€0–800

Time0.3–2.5 h

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

Parts involved

cac coolant pump awiring harnessecm

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.