I have a 2002 Jeep Liberty Sport 3.7L with code p0420 what does this mean?

Question

I have a 2002 Jeep Liberty Sport 3.7L showing code p0420 what does this mean?

Answer 1

Hi there,

This means the bank 1 catalytic converter is not working as well as it should be. You will either find a faulty O2 sensor or the converter itself is the problem and will probably have to replace it. I usually have folks clear the code and see if it returns. Sometimes even the fuel you are using can kick the code. If it comes back then further investigation is required.