How to fix code P0137?

Answer 1

Code P0137 indicates a low voltage reading from the O2 sensor circuit, specifically for the downstream sensor (Bank 1). To fix this issue, first, inspect the wiring and connectors for any damage or corrosion that could affect the sensor's signal. Next, test the O2 sensor itself to ensure it is functioning properly; if it’s faulty, replace it. Finally, clear the code and monitor the system to see if the issue reoccurs.