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P0051 — O2 Sensor Heater Circuit Low (Bank 2 Sensor 1)

Low voltage in bank 2 upstream O2 sensor heater circuit.

Severity: MediumRepair: $100-$300Difficulty: Easy

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Common symptoms of P0051

Common causes of P0051

Repair cost & difficulty

Typical cost to fix P0051: $100-$300 · Difficulty: Easy

Pro tip: Check shared fuse first if both banks have heater codes.

Vehicles commonly affected

V6/V8 engines

Related trouble codes

P0050P0052

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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.