P0387
Crankshaft Position Sensor B Circuit Low Input
Generic code
Ignition System
High severity
Moderate repair
Free on OBD DashX
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What P0387 means
- The fault code P0387 indicates that there is a low input signal detected from the crankshaft position sensor B circuit. This can cause issues with the engine's timing and performance.
Possible symptoms
- Difficulty starting the engine
- Engine misfires or stalls
- Poor acceleration or power
- Rough idling
- Illuminated check engine light
Possible causes
- Malfunctioning crankshaft position sensor
- Damaged or corroded wiring in the circuit
- Loose or corroded electrical connections
- Failed engine control module (ECM)
Related parts
- Crankshaft Position Sensor: The crankshaft position sensor monitors the position of the crankshaft to regulate fuel injection. Problems lead to engine misfire and engine stalling
Possible solutions
- Replace the crankshaft position sensor
- Check and repair any damaged wiring or connections
- Tighten or clean any loose or corroded electrical connections
- Replace the engine control module (ECM) if necessary
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P0387 on OBD DashX
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