P0420 engine code need help

ron

Well-known member
Joined
Apr 4, 2009
Messages
148
Reaction score
0
The service engine soon lite came on .Took it to auto zone they said it's a PO420 code. Just put catted xpipe on slp loud mouth at deans peformance about 500 miles ago. Car ran great till now what to do. Any help would be great thanks RON there is no tune or mil elminators or pulley .the car has a jlt cold air intake slp catted xpipe and borla stingers
 

Dana

Bluesmobile
Joined
Mar 2, 2004
Messages
2,619
Reaction score
0
Check the wiring for the O2 sensors near the exhaust pipes. On occasion they can get too close to the pipes and melt the insulation.
 

Create an account or login to comment

You must be a member in order to leave a comment

Create account

Create an account on our community. It's easy!

Log in

Already have an account? Log in here.

Top Bottom