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P0391 — Camshaft Position Sensor B Range/Performance (Bank 2)

Bank 2 exhaust CMP sensor signal not matching expected patterns.

Severity: HighRepair: $100-$2,000Difficulty: Advanced

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Common symptoms of P0391

Common causes of P0391

Repair cost & difficulty

Typical cost to fix P0391: $100-$2,000 · Difficulty: Advanced

Pro tip: If correlation codes also present, timing chain work needed.

Vehicles commonly affected

V6/V8 engines

Related trouble codes

P0390P0392P0017

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ScanFixAI is a diagnostic aid, not a substitute for professional repair. Cost estimates are typical ranges and vary by vehicle and region.