The P0137 trouble code indicates that the oxygen (O2) sensor circuit of the bank 1 sensor 2 is experiencing low voltage. This code typically points to issues related to the oxygen sensor responsible for monitoring the oxygen content in the exhaust gas downstream of the catalytic converter, which affects the emission control system.
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
Code symptoms P0137.
1. Poor fuel efficiency.
2. Engine performance issues.
3. Malfunction indicator light (MIL) illumination.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0137.
1. Faulty oxygen (O2) sensor.
2. Low voltage or wiring issues within the sensor circuit.
3. Problems with the Engine Control Module (ECM).
Code Solutions P0137.
1. Replace the oxygen (O2) sensor if it is faulty.
2. Check and repair any low voltage or wiring issues in the sensor circuit.
3. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.