Re: 05 wk 5.7 obd code p0430
How many miles on your 05? I suppose it is possible for bad fuel to cause this, and leaded fuel will, for sure. If you have over ~75K on it and are not sure if the O2 Sensors have ever been changed, I would probably change them. I had a lazy one on my WK and changed all four. Cost is about $120, or so. Labor is ??? I just got back from a ~2000 mile trip with my Hemi LX and noticed a lazy one on it. It only has 53K on it....the WK's went out at just over 60K. Strangely, the lazy ones were both in the same position, the 2/1 sensors, or passenger side front. If a sensor or sensors is bad your fuel economy will probably be sub-par too. Before you change them, go ahead and check for exhaust leaks though, just for giggles. I imagine a leak could trigger a code, but I had a pretty good leak at a header flange gasket and didn't get a code. It did send a false lean signal to the PCM and my fuel economy tanked as a result. Good luck on your search. Hope it's not a cat. They can be spendy.
05 LX/RT and 06 WK/GCO, (modded similarly) with MDS "ON" Light, Vortex Gens, Debadged, DashHawk, BT Catch Can, SRT CAI W/Add Air Inlet, K&N Filter, Sonnax Trans Line Press Booster, SC Tuner W/Adv Trans Tuning App, DS Tuner, Cust tubular headers w/3 in. catback, Bilsteins, SRT frt/rear bumpers, Eibach SRT Lwr Sprgs & Sways, FRI Sidewinder Cam Adv 2*, 6.1 valvetrain, SLP 25% UD Pulley, BBK 90mm TB, SOS Coils/.060 spark plug gap.