Hi Guys,

I got a downpipe installed from Rick Rotory and the next day my Check engine light came on, but my car runs perfect. After diagnosting it I got Code 5 and 38.
Code 5: Knock Sensor
Code 38: accelerated warmup system and air supply valve (AWS)

I also heard that you can eliminate the AWS its just there to heat up the precat. By doing this will the check engine light still come on?

Thanks all the help appreciated