The P0055 trouble code is related to the HO2S (Heated Oxygen Sensor) Heater Resistance in Bank 1, Sensor 3. It indicates a potential issue with the resistance of the heater in the oxygen sensor positioned in the exhaust system’s first bank and third sensor location. This code is often found in vehicles with advanced emission control systems.
HO2S Heater Resistance Bank 1 Sensor 3
Code symptoms P0055.
1. Increased fuel consumption.
2. Engine may run roughly.
3. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0055.
1. Malfunctioning oxygen sensor heater.
2. Electrical issues within the sensor circuit.
3. Problems with the Engine Control Module (ECM).
Code Solutions P0055.
1. Inspect and replace the oxygen sensor if the heater is malfunctioning.
2. Check the electrical connections and wiring for any faults or damage.
3. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.