Got a P0420 code. Changed the CAT and the code still came back. could it be the secondary O2? It is a Flowmaster high flow cat. would spark plug non fouler fix this code? need to pass emissions in IL lol
Post by paulaurora on Dec 14, 2019 21:28:11 GMT -6
99% its the cat.
1998GX 168,000 Intrigue-RIP total loss. 1999 Intrigue GLS 215,000 mil-Trade it in for Aurora 2001 Aurora 4.0 2nd owner! miles 22,000~170,700- Sold 2003 Aurora 4.0 3rd Owner! miles 130k 2018 Volvo s90 Inscription 18,000 miles