The P0041 trouble code indicates that the downstream oxygen sensors have been swapped from one bank to another. This code points to a potential issue with the connection or installation of the oxygen sensors in the vehicle’s exhaust system. The term “downstream” typically refers to the sensors after the catalytic converter.
Downstream Oxygen Sensors Swapped From Bank to Bank
Code symptoms P0041.
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 P0041.
1. Incorrect installation of downstream oxygen sensors.
2. Wiring or connector issues within the sensor circuit.
3. Sensor connection mix-up during maintenance or repair work.
Code Solutions P0041.
1. Reinstall the downstream oxygen sensors in their correct positions.
2. Check and repair any damaged wiring or connectors in the sensor circuit.
3. Ensure that the correct sensors are connected to the corresponding banks.