Anyone get this code before and if you did how did you fix it?
I am thinking it is an issue with either one of the Oxygen Sensors or possibly a bad High Flow Cat.
Any ideas?
Anyone get this code before and if you did how did you fix it?
I am thinking it is an issue with either one of the Oxygen Sensors or possibly a bad High Flow Cat.
Any ideas?
If the O2 sensor was bad you would get an O2 code...
P0420 (bank 1, LHS) or P0430 (bank 2, RHS) show up when the catalytic converter has lost/degraded it's ability to function (storing oxygen and oxidizing HC/CO, reducing NOx)... when conditions are correct the PCM runs the test at idle... it drives the AFR rich and then lean for a few moments and times the reaction between sensor 1 (front) and sensor 2 (rear).