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P0155 — O2 Sensor Heater Circuit (Bank 2 Sensor 1)

Heater circuit fault for upstream O2 on bank 2.

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

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Common symptoms of P0155

Common causes of P0155

Repair cost & difficulty

Typical cost to fix P0155: $100-$300 · Difficulty: Easy

Pro tip: Check fuse first.

Vehicles commonly affected

V6/V8 engines

Related trouble codes

P0135P0050P0161

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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.