Powertrain
generic / SAE
P0389
Crankshaft Position Sensor B Circuit Intermittent
Crank sensor B signal jumps or drops out intermittently — connector or wiring issue. 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.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / 89
Possible causes
- Intermittent connector high
- Connector with intermittent contact under vibration low
- Harness routed against vibrating component low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 60–500 €
- Estimated time: 0.5–2.5 h
- Component: crankshaft position sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012