P0422 Main catalytic converter - efficiency below threshold (bank 1)
P0422 - OBD-II Trouble Code Technical Description P0422 indicates that the primary catalytic converter (bank 1) efficiency is below acceptable levels. What does trouble code P0422 mean? Trouble code P0422 indicates low efficiency of the main catalytic converter (bank 1). This means that the catalytic converter is not performing its function properly and is not able to adequately remove harmful substances from the engine's exhaust gases. Possible Causes Several possible causes for the P0422 trouble code are: What are the symptoms of a P0422 trouble code? Symptoms for a P0422 trouble code may include: Remember that symptoms may vary depending on the specific cause of the problem and the condition of the vehicle. If you notice these symptoms or the Check Engine Light comes on, it is recommended...