kinglt-1

iTrader: (26)

Hey guys have a couple of questions to ask. I put about 2 gallons of race gas to about 6 gallons of pump gas and the car seems to hate it. I then realized that the race gas was leaded(oops), so I hookd the car up to my scanner. No sooner than that my car threw a bank 1 sensor 1 o2 heater circuit malfunction code. Also at idle my ltft was reading 25 on bank 1 and 10 on bank 2, but they lock in at 0 when you get into power enrichment. So I ran that gas out reset the pcm and filled up with 94 premeium gas and now my bank 1 still is pegging 25 on the ltft. Bank 2 is at around 0 the whole time which is perfect. Do I need to replace the o2 sensor on that bank, it seems to be the most logical answer for the problem with the ltft. Thanks!!!

horist

Most likely yes you need to replace the O2 sensor... lead kills O2 sensors fast (it coats them) ... I'm surprised both didn't die... the one that's still reading is probably a bit lazy now though

kinglt-1

iTrader: (26)

thanks for the info I will replace both!!