Manifold cataltst efficiency low (bank 1) how can I tell which side (passenger or driver) or if its the sensor or converter. this tuuck has 3 converters one on each side and a main. and is there anyway to check the sensor out to see if its good ?
P0420 Bank 1 catalyst deficiency,on this truck passenger side catalytic converter is the problem,There is a way to check rear oxygen sensor by reading waveform and data from it with a scanner and an oscilloscope.
