Title pretty much says it all. 02 v8 and I've been getting a P0171 code popping up. Interestingly enough, it has only thrown a CEL once, and I just happened to read codes off the car before taking my tune off yesterday
Anyway, it's come up ever since I had the Thunderbolt cats put in last March after they busted the gasket at the flange, but it was repaired and I also found out they put the rear 02 sensors I gave them on the same side, but I replaced those.
What I want to know is could this be cause by the timing slightly off? I did all tensioners and pretty much a rebuild last February. I haven't noticed any power issues, but I'm hoping it's not mechanically related.
That said, what am I looking at for Bank 1? Exhaust leaks, air leak at intake manifold gasket, fuel injector or bad O2? And what's the easiest ways to check all options? Also, if this has persisted for a few months without me knowing could that cause damage or will I be good if resolved soon. Thanks for any help
Anyway, it's come up ever since I had the Thunderbolt cats put in last March after they busted the gasket at the flange, but it was repaired and I also found out they put the rear 02 sensors I gave them on the same side, but I replaced those.
What I want to know is could this be cause by the timing slightly off? I did all tensioners and pretty much a rebuild last February. I haven't noticed any power issues, but I'm hoping it's not mechanically related.
That said, what am I looking at for Bank 1? Exhaust leaks, air leak at intake manifold gasket, fuel injector or bad O2? And what's the easiest ways to check all options? Also, if this has persisted for a few months without me knowing could that cause damage or will I be good if resolved soon. Thanks for any help