How to find check engine problems?

Question

Keeps saying check engine and I don’t know the problem. I also don’t know how to fix it.

Answer 1

Hi there

This code points to a problem with the bank 1 catalytic converter. There can be several causes for this code to appear. Here is a list of the most common issues.

P0420 - Catalyst System Efficiency Below Threshold Bank 1

Read more: https://www.autocodes.com/p0420.html