P0155 2009 Ford Fusion Code - O2 Heater Circuit Bank 2 Sensor 1

The code P0155 indicates an issue with the O2 sensor heater circuit in Bank 2 Sensor 1 of the vehicle.

Common symptoms of this code may include poor fuel economy, rough idling, engine misfires, and an illuminated check engine light.

Possible causes of this code include a faulty O2 sensor, damaged wiring or connectors in the sensor circuit, or a blown fuse related to the O2 sensor heater.

Diagnosing this code usually involves checking the O2 sensor heater circuit for continuity, inspecting wiring for damage, and testing the sensor's heater resistance using a multimeter.

While you can drive the vehicle with this code, it is advisable to address the issue promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.

Repairing this code typically involves replacing the faulty O2 sensor in Bank 2 Sensor 1, repairing any damaged wiring or connectors, and ensuring the sensor heater circuit is functioning properly.

Clearing the code without addressing the underlying problem may temporarily turn off the check engine light, but the issue will likely reoccur, affecting the vehicle's performance and emissions.

Yes, this code can cause the vehicle to fail an emissions test due to improper oxygen sensor function, which affects the vehicle's emissions levels.

The cost of repairing this code can vary depending on the cause of the issue, the labor rates of the repair shop, and whether genuine Ford parts are used. It is recommended to obtain quotes from reputable mechanics.

The occurrence of this code can vary depending on the vehicle's mileage, maintenance history, and driving conditions. Regular maintenance and timely O2 sensor replacements can help prevent this code from appearing frequently.