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P0161 — O2 Sensor Heater Circuit (Bank 2 Sensor 2)

Heater circuit for downstream O2 on bank 2 has failed.

Severity: MediumRepair: $80-$250Difficulty: Easy

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Common symptoms of P0161

Common causes of P0161

Repair cost & difficulty

Typical cost to fix P0161: $80-$250 · Difficulty: Easy

Pro tip: Check wiring along exhaust for heat damage.

Vehicles commonly affected

V6/V8 engines

Related trouble codes

P0141P0155P0056

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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.