I got a CEL with code P0131, "O2 sensor circuits, low volts, bank 1, sensor 1". A quick search tells me it's probably the first O2 sensor gone bad, but that it could also be the crappy wiring. Exactly how do you check the wiring? How far back into the harness should I check?

Also, my Kia is running very rich, with some black smoke coming out the tailpipe and getting horrible gas mileage. Could this be as a result of the faulty O2 sensor or could there be another problem lurking?

Any recommendations for a genreric/universal O2 sensor?

TIA,

Javier S.

Last edited by Beater_Sportage; 04/12/08 01:34 AM.