Posts Tagged: P0137 trouble code

P0137 trouble code: What it means and how to fix it

Learn what a P0137 trouble code means and how to fix it A P0137 trouble code is defined as: Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 1). This sensor is located on the engine bank that houses #1 cylinder and is located AFTER the catalytic converter. The oxygen sensor measures oxygen levels in exhaust gases post-combustion to optimize engine performance and minimize air pollution. If oxygen levels are too low, indicating a rich fuel mixture, the PCM reduces fuel delivery. Conversely, if oxygen levels are too high, indicating a … Read More