OBD-II code · Powertrain (generic, extended)
P2C37 Cold Start Engine Coolant Pump Performance
During cold start, the engine coolant pump does not produce the expected flow. Pump aging combined with high cold viscosity, or pump-disable strategy malfunction.
Is it safe to drive with P2C37?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyPump output degraded with age
- PossibleCold coolant viscosity too high
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–7 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Engine Coolant Pump, Engine Coolant Loop
Related codes
- P2C34Crankcase Pressure Sensor B Circuit Low
- P2C35Crankcase Pressure Sensor B Circuit High
- P2C36Crankcase Pressure Sensor B Circuit Intermittent/Erratic
- P2C38Cylinder Head Temperature Sensor B Circuit
- P2C39Cylinder Head Temperature Sensor B Range/Performance
- P2C3ACylinder Head Temperature Sensor B Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.