OBD-II code · Powertrain (generic)
P06EF Engine Restart Performance
After a stop-start auto-stop the engine takes longer than calibrated to restart, or restart is missed. Possible causes are weak starter, low battery state of charge, weak crank position signal at low RPM, or a fuel rail that lost prime.
Is it safe to drive with P06EF?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBattery state of charge low
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Starter Motor, Battery, Crankshaft Position Sensor
Related codes
- P06ECFuel Injector Control Module Requested MIL Illumination
- P06EDEngine RPM Output Circuit Low
- P06EEEngine RPM Output Circuit High
- P06F0Reductant Control Module Internal Temperature Sensor Circuit
- P06F1Reductant Control Module Internal Temperature Sensor Range or Performance
- P06F2Reductant Control Module Internal Temperature Sensor Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.