P0420 Honda -

Question

the car would not pass smog because the computer would reset it self so we did some researdh and found the the radio was not in so we hook up the radio and then the next day the check engine light came on. so i hook up the obd ii and then the code came up p0420 and the car is running beauitful help

Answer 1

Hi there,

The P0420 code means the catalytic converter is not working as good as it should. This is usually the fault of the converter and the converter will require replacement. Sometimes other issues can cause the code. A poorly running engine, an exhaust leak or a faulty rear O2 sensor can cause the code to appear as well.