: What are your thoughts on this code?

06-30-08, 12:24 PM
My SES light has been coming on intermittently, usually toward the end of a tank of gas. I have the 4.6 V8 and only put 93 octane in it.

My brother checked it, and the code is P0420 - Catalytic Converter System below threshold (Bank 1).

What does this mean?