Scotty. Love your videos they are very informative and helpful. My wife's van is driving me crazy. Engine light was on so i went through did new cats O2 sensors fixed exhaust leak changed plugs and all lights was green then bamb right back to all the same codes. Bank 2 insufficient post cat system 2 lean. Everything that i just fixed shows no sign of it. So now im thinking what if its a bad ground or ECM. I just need another mind helping me to wrap around this. Done dropped over a grand in updating this part of the engine. Im at the point that I can't figure it out. I have not changed the boots on the coil packs yet. Like I mentioned all codes gone for almost 2 days checked it with my scan tool no dtcs at all then about dusk the light came back on and i scanned it again and p2098 or p0298 is what came up again which involves everything i just fixed. 2hat is your idea? Could it be a bad ground or a ecm or pcm related issue. I have been working on cara since i could hold a wrench but this this has got me stumped without taking it to a dealer. Thank you for taking the time to read this and for your help