P0388Crankshaft Position Sensor B Circuit High
Crank sensor B above upper plausibility — open signal or short to B+. 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.
Can I keep driving? With caution
You can drive to the shop, but do not postpone the repair. The problem may worsen and damage other components.
Sistema Afectado
Sistema de Encendido · Bujías, bobinas y cilindros
El problema afecta la combustión en uno o más cilindros: bujías, bobinas o inyectores.
Espacio para vendedores de repuestos
Aún no hay un anunciante en este espacio.
Possible Causes
The components or conditions that trigger this code
- 1Open signal line Connector pins corroded - high contact resistance Supply wire pinched against B+ source
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Difficulty: medium. Estimated time: 0.5-2.5 hours. Estimated cost: €80-€
- 2DIY possible
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
Spark plugs + coils
* Diagnosis only: $50–$150
Quick Info
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