OBD-II code · Powertrain (generic, extended)
P2DE9 Cold Start Engine Coolant Pump Underspeed
During cold start, the engine coolant pump runs below the calibrated minimum speed. Cold viscosity load too high or pump weak.
Is it safe to drive with P2DE9?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyCold coolant viscosity too high
- PossiblePump output degraded
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
Related codes
- P2DE6Drive Motor A Clutch Actuator Performance
- P2DE7Cold Start Engine Coolant Bypass Valve C Range/Performance
- P2DE8Cold Start Engine Coolant Bypass Valve D Stuck Open
- P2DEACylinder 1 Intake Valve Lift Range/Performance
- P2DEBCylinder 2 Intake Valve Lift Range/Performance
- P2DECCylinder 3 Intake Valve Lift Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.