Toyota Error Code P1155: How to Fix It

Q: What causes Toyota P1155 error code?

P1155 is typically caused by a faulty oxygen sensor heater element, damaged wiring to the sensor, blown fuses, or rarely, ECU problems. The heater circuit helps the sensor reach operating temperature quickly for accurate readings.

Q: Can I drive with P1155 code?

Yes, you can drive with P1155, but fuel economy may suffer and emissions will increase. The engine will still run safely, but you should address the issue promptly to prevent potential catalytic converter damage and pass emissions testing.

Q: How much does it cost to fix P1155?

DIY repair costs $50-150 for a replacement oxygen sensor. Professional repair typically costs $200-400 including parts and labor. The oxygen sensor itself usually costs $80-120 for Toyota vehicles.

Q: Is P1155 the same on all Toyota models?

Yes, P1155 has the same meaning across all Toyota models - it indicates Bank 2 Sensor 1 air-fuel ratio sensor heater circuit malfunction. However, sensor locations may vary between different Toyota engines and model years.

Q: How long do Toyota oxygen sensors last?

Toyota oxygen sensors typically last 60,000-100,000 miles. However, factors like fuel quality, driving conditions, and engine maintenance can affect their lifespan. Regular maintenance and quality fuel can help extend sensor life.

Abstract

Error code P1155 indicates a malfunction in the air-fuel ratio sensor heater circuit for Bank 2 Sensor 1 in your Toyota. This error occurs when the oxygen sensor's heating element isn't working properly, which can affect fuel efficiency and emissions.