OBD-II code · Powertrain (generic, extended)
P2CB1 Charge Air Cooler Coolant Pump B Overspeed/Air In System
Charge air cooler coolant pump B reports a overspeed/air in system condition. CAC coolant loop circulation is impaired.
Is it safe to drive with P2CB1?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyAir pocket in coolant loop
- PossibleCoolant level low
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
- P2B83Charge Air Cooler Coolant Pump A Overspeed/Air In System
- P2CAECharge Air Cooler Coolant Pump B Control Circuit Low
- P2CAFCharge Air Cooler Coolant Pump B Control Circuit High
- P2CB0Charge Air Cooler Coolant Pump B Performance
- P2CB2Charge Air Cooler Coolant Pump B Underspeed
- P2CB3Charge Air Cooler Coolant Pump B Stuck/Stalled
- P2CB4Charge Air Cooler Coolant Pump B Supply Voltage Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.