Hi again all! 98 lesabte.had a new AC Delco upper O2 sensor replaced over 6 months ago.the reason? Code 0420,bank 1,sensor 1. All was running good until,last night. I put 8 ozs. Marvel mystery oil in with a empty tank. Its. Suppos d to be an 18 gallon tank..though in the orange,near empty,it will take 12_13 gallons fuel.directions are 4 ozs. Per 10 gallons.so,I put 8.
Got a cel code half hour ago, same thing.p0420. I have a scanner,so I erased it. Car runs fine.
I think,the MMO I put in in last nifht,some has gotten on the sensor. What should I do? Discontinue use of MMO? Put another tank of gas in without MMO after this,see if code dosnt come back?
Hopefully I won't have too have it replaced again,the sensor.seems the code showed, 24 hours in and 40 miles driving ,after putting MMO in.
Got a cel code half hour ago, same thing.p0420. I have a scanner,so I erased it. Car runs fine.
I think,the MMO I put in in last nifht,some has gotten on the sensor. What should I do? Discontinue use of MMO? Put another tank of gas in without MMO after this,see if code dosnt come back?
Hopefully I won't have too have it replaced again,the sensor.seems the code showed, 24 hours in and 40 miles driving ,after putting MMO in.