Sorry for not getting back to you sooner -- not much time to scour the boards in the past few days.
(more info in my pm, but thought I'd post this here as well in case its helpful to anyone)
Here is basically what happened to me.
CEL was on -- code read out that the oxygen sensor was bad. Took it to a shop (not dealer) and had them replace it.
about a day later the CEL pops back on -- so I go back and find out the other O2 sensor is bad... so they replace that one too.
Then about another day or so the CEL is back on... reading O2 sensor. I reset it... and it stays off for like an hour. Started grad-school in philly so didn't have much time to deal with it. However, my gas mileage was going down the tubes (like 18mpg) so as soon as I could I took the car to the dealer.
Turns out that the diffa (spl.) unit which if I remember correctly controls the heating and maybe the current to the O2 sensors was bad because the shop that put the sensors in spliced some wire wrong. The result is that the the ECU doesn't get a proper signal from the sensors, so it throws an O2 sensor fault.
Dealer had to replace the Diffa and the ECU because both had been damaged by the spliced wire, however, that being done, the CEL is off and gas mileage is back where it should be.
Quote:
Originally Posted by vix_98_318ti bump ANY HELP?? |