The P0146 trouble code indicates that there is no activity detected in the oxygen (O2) sensor circuit of the bank 1 sensor 3. This code typically points to issues related to the oxygen sensor positioned after the catalytic converter, monitoring the oxygen content in the exhaust gas, and aiding in emission control.
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3)
Code symptoms P0146.
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 P0146.
1. Faulty oxygen (O2) sensor.
2. Wiring or connector issues within the sensor circuit.
3. Problems with the Engine Control Module (ECM).
Code Solutions P0146.
1. Replace the oxygen (O2) sensor if it is faulty.
2. Check and repair any wiring or connector issues in the sensor circuit.
3. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.