[GA/\/\/\/\A_CT]

At what mileage might an 02 sensor normally go out?

Is it normal to have one go bad?

[Grkcobra93]

Yes its normal for a sensor to go bad, it happens.

If your car is tuned & not tuned well, running a rich A/F mixture can cause O2's to go bad much sooner than usual.

[GA/\/\/\/\A_CT]

Originally Posted by Grkcobra93

Yes its normal for a sensor to go bad, it happens.

If your car is tuned & not tuned well, running a rich A/F mixture can cause O2's to go bad much sooner than usual.

Thanks for the info. Would an untuned car with a catted downpipe have the same possibility?

[Grkcobra93]

Originally Posted by GA/\/\/\/\A_CT

Thanks for the info. Would an untuned car with a catted downpipe have the same possibility?

Yes

[GA/\/\/\/\A_CT]

Would it be more likely in a tuned ECU car? Would that need to be overridden, typically? Or would that suggest a problem with the tune?

[RTPenland]

Originally Posted by GA/\/\/\/\A_CT

Would it be more likely in a tuned ECU car? Would that need to be overridden, typically? Or would that suggest a problem with the tune?

Sure more likely in a tuned car, yes most all tuners squash codes, no not an indicator that there is a problem with the tune. Unless someone is going with some extreme parameters delivered by a 3rd party "custom" tune you have nothing to worry about with any of the major tuners (MHD, Mission, Bm3, MG) although they do all take a slightly different approach. As an example Mission (who I have become familiar with over the years after running other piggybacks and flashes) runs richer fuel mixtures sooner in the boost curve due to their focus on engine safety. While others may delay a bit.

That said regardless of the flashes I have ran over the years this is to be expected. While I am not a fan of catless that is the simple solution (technically speaking)