2002 toyota camry 2.2L code P0420

Question

I need with problem code P0420 ,what can i do?

Answer 1

This code is stored when the catalytic converter is not cleaning the exhaust enough to satisfy the rear O2 sensor. This can be caused by a poor running engine or a failure of the converter or rear O2 sensor.If the engine is running poorly, start with a tune up and clearing the codes, then take it from there. If there continues to be a 420 code, in most cases the catalytic converter needs to be replaced to resolve the problem.