Hi, I'm usually on the Tech side but a friend of mine is having an issue with his Durango and thought this would be a good place to ask a question. He is getting a P0420 code and his SES is on. I know this could be a downside O2 sensor and someone was telling me about O2 simulators, have you guys heard of them and do they work? If so where would I go to look for one for him?

 

I got my 02foulers off ebay, if that helps.

 

take a spark plug anti fouler and put inbetween the sensor. i ran jba catless mids on my chrysler and put steel wool between 2 anti foulers and never threw one code.