OBD-II code · Powertrain (generic, extended)
P2E81 Cold Start Engine Coolant Bypass Valve D Stuck Closed
During cold start, engine coolant bypass valve D is stuck closed. Coolant cannot flow through the affected branch.
Is it safe to drive with P2E81?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyValve stuck closed at cold
- PossibleActuator response sluggish at cold
- Less likelyCarbon or debris buildup preventing free movement
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Engine Coolant Bypass Valve D
Related codes
- P2E7EA/C Compressor Control Module Internal Temperature Sensor B Circuit High
- P2E7FA/C Compressor Control Module Internal Temperature Sensor B Circuit Low
- P2E80A/C Compressor Control Module Internal Temperature Sensor B Circuit Intermittent/Erratic
- P2E82Cold Start Engine Coolant Pump Overspeed
- P2E83Fuel Rail Pressure Performance - Engine Off
- P2E84Battery Charger B Input Voltage Sensor Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.