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p0420.....what to do?

1K views 3 replies 2 participants last post by  99saabse 
#1 ·
The car is a 99 v6 and I had an aftermarket cat put on the car about 3 months when I had the flex pipe replaced (too many speed bumps) and now three months 4,000 miles later i have a check engine light on which gives the code p0420 catalyst efficiency below threshold bank 1. I have been told it is due to my cat and so I am wondering about a few things:

1. Can I get a oxgyen sensor simulators for my car
2. If i cant get sims does someone here have a scamatic of the o2s wiring so I can make my own o2 sims, I would need to know the parameters of the wiring such as the resistance and so on

Any help is greatly appreciated!!
 
#3 ·
I have seen them that the updated software fixed. We also have cars that this does not help. The software updates are pretty old though. it should have had this early on under warranty.
 
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