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P0651 — Sensor Reference Voltage B Circuit Open

Second 5V reference circuit has a fault.

Severity: HighRepair: $50-$1,000Difficulty: Advanced

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Common symptoms of P0651

Common causes of P0651

Repair cost & difficulty

Typical cost to fix P0651: $50-$1,000 · Difficulty: Advanced

Pro tip: Same diagnosis as P0641 but for reference circuit B.

Vehicles commonly affected

All makes

Related trouble codes

P0641

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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.