OBD-II code · Powertrain (generic, extended)
P2B65 Coolant Pump B Overspeed/Air in System
Coolant pump B reports a overspeed/air in system condition. Coolant circulation through the affected loop cannot be commanded reliably.
Is it safe to drive with P2B65?
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
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Coolant Pump B, Wiring Harness, Ecm
Related codes
- P26FACoolant Pump C Overspeed/Air in System
- P2B6CCoolant Pump D Overspeed/Air in System
- P2B86Coolant Pump A Overspeed/Air in System
- P2DF7Coolant Pump E Overspeed/Air in System
- P2B62Coolant Pump B Supply Voltage Circuit
- P2B63Coolant Pump B Stuck/Stalled
- P2B64Coolant Pump B Control Module Overtemperature
- P2B66Coolant Pump D Control Circuit/Open
- P2B67Coolant Pump D Control Circuit Low
- P2B68Coolant Pump D Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.