Originally posted by kscontourkid:
I ran a PO420. not a censor. i did some research about that and found that bad plugs can cause the code to throw.



I take it you read this TSB.

http://www.v8sho.com/SHO/TSB0197HO2SServiceTips.htm

"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles