Try to make this brief, ive read nearly all the articles ive seen in reference to this. Unfortunately most are people who installed catless downpipes.
Stock car. Got the p0420 code, so i bought a rear o2. When i went to install it i noticed the flex had disconnected itself from the downpipe. Returned rear o2 and had a new flex section welded in.
Day +1 after new flex, p0420 comes back.
My question is this, to try an target where to start, i have a slight idle irregularity. Any recommendation which o2 i should try first? I was thinking front cause of the idle.
Thanks guys.
Stock car. Got the p0420 code, so i bought a rear o2. When i went to install it i noticed the flex had disconnected itself from the downpipe. Returned rear o2 and had a new flex section welded in.
Day +1 after new flex, p0420 comes back.
My question is this, to try an target where to start, i have a slight idle irregularity. Any recommendation which o2 i should try first? I was thinking front cause of the idle.
Thanks guys.