OBD-II code · Powertrain (generic)
P0C74 Motor Electronics Coolant Pump B Control Performance
The motor electronics coolant pump B control reports a performance fault. Pump output does not match commanded duty.
Is it safe to drive with P0C74?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyPump output degraded
- PossibleAir pocket in coolant loop
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–7 h
- Emissions test
- Usually unaffected
- Parts involved
- Motor Electronics Coolant Pump B
Related codes
- P2BD7Motor Electronics Coolant Pump C Control Performance
- P0C71Hybrid/EV Battery Temperature Sensor D/E Correlation
- P0C72Hybrid/EV Battery Temperature Sensor E/F Correlation
- P0C73Hybrid Battery Pack Cooling Pump Performance
- P0C75Hybrid/EV Battery System Discharge Time Too Short
- P0C76Hybrid/EV Battery System Discharge Time Too Long
- P0C77Hybrid/EV Battery System Precharge Time Too Short
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.