p0171: system to lean blank 1
p0174:system to lean blank 1
p0300: random/multiple cylinter misfire detected
p0430: catalst system efficincy below threshold blank2
i know nothing about cars.
what do I do or replace to fix all of this.
it all started when I put in a k&n filter
have the same problem?
Tuesday, January 29th, 2008 AT 6:46 PM