OBD-II code · Powertrain (generic)
P0386 Crankshaft Position Sensor B Circuit Range/Performance
Crank sensor B reads in range but plausibility check fails. The crankshaft position sensor provides RPM and crank angle — without a valid signal, no ignition and no injection. Engine will not start or stalls instantly.
Is it safe to drive with P0386?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor drift
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Crankshaft Position Sensor
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.