Engine Error
P0387
Crankshaft Position Sensor B Circuit Low Input
Severity
High
Symptoms
Engine cranks but will not start
Common Causes
- Short to ground in sensor B circuit
- Dead crankshaft sensor B
- Low battery voltage
- PCM sensor ground failure
How to Fix
- 1 Trace and repair short to ground
- 2 Replace crankshaft position sensor B
- 3 Test charging system
- 4 Test PCM ground circuit
Estimated Repair Cost
USD
$100
–
$400
Sensor replacement: 150 - 350