OBD-II code · Powertrain (generic, extended)
P2CB4 Charge Air Cooler Coolant Pump B Supply Voltage Circuit
Charge air cooler coolant pump B reports a supply voltage circuit condition. CAC coolant loop circulation is impaired.
Is it safe to drive with P2CB4?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySupply fuse blown
- PossibleWiring or connector fault
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Cac Coolant Pump B, Wiring Harness, Ecm
Related codes
- P2BC2Charge Air Cooler Coolant Pump A Supply Voltage Circuit
- P2CB1Charge Air Cooler Coolant Pump B Overspeed/Air In System
- P2CB2Charge Air Cooler Coolant Pump B Underspeed
- P2CB3Charge Air Cooler Coolant Pump B Stuck/Stalled
- P2CB5Charge Air Cooler Coolant Pump B Control Module Overtemperature
- P2CB6Turbocharger/Supercharger Boost System Performance
- P2CB7Turbocharger/Supercharger Boost Pressure B Not Detected – Mechanical
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.