How much does it cost to fix P0155?

Typical repair cost is $100–$400.

P0155 — O2 Sensor Heater Circuit — Bank 2, Sensor 1

Medium Severity · Sensors

OBD-II code P0155 means your vehicle's ECU detected: O2 Sensor Heater Circuit — Bank 2, Sensor 1. Below: causes, step-by-step fixes, and repair cost — free, no signup needed.

Drivable short-term but schedule a diagnosis soon. Prolonged driving can worsen the issue.

Typical Repair Cost

$100–$400

Parts + labor, national average

Severity

Medium

Schedule repair soon

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Common Causes of P0155

Heater failure
Wiring
Fuse

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How to Fix Code P0155

Check fuse

Inspect wiring

Replace Bank 2 upstream O2

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FAQ — Code P0155

What does OBD-II code P0155 mean?

P0155 means your vehicle's onboard computer detected: O2 Sensor Heater Circuit — Bank 2, Sensor 1. This is a medium-severity code in the Sensors category.

How much does it cost to fix code P0155?

Typical repair cost for P0155 is $100–$400 including parts and labor. Costs vary by vehicle make, model, and location. A free scan at AutoZone or O'Reilly is a good first step.

Can I drive my car with code P0155?

Code P0155 is generally safe for short trips, but have it diagnosed soon to prevent the problem from worsening.

What are the most common causes of P0155?

The most common causes are: Heater failure, Wiring, Fuse. Always start with the cheapest diagnosis step before replacing parts.

Will code P0155 clear itself?

Code P0155 will clear itself after the underlying issue is fixed and the ECU completes several successful drive cycles. Clearing it without fixing the root cause only masks the problem temporarily.

Is P0155 showing on your car?

Enter your VIN for a free vehicle-specific report — recalls, specs, and market value. No signup required.

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OBD-II code data is based on SAE J2012 standards and general repair industry data. Repair costs are national averages and vary by vehicle, location, and shop. Always consult a qualified mechanic for a diagnosis specific to your vehicle.