Thread: Pre cat o2's
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      06-10-2018, 09:24 PM   #12
dparm
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Quote:
Originally Posted by opihi5 View Post
It only seems to happen after driving hard for awhile so that makes sense and the codes usually go away after clearing. both sets i've gone through lasted about 2-3k miles before giving me problems. Guess i'll just have to keep replacing o2's if there aren't alternatives.
That seems like an absurd waste of money for a few extra HP from a tune. Even if the sensors are $50 each, and you change them 4 times a year, that's $200 in parts alone -- plus the labor/time to do it, ordering another one, and the aggravation of wrenching on the car for an hour.

Have you talked to the tuner to see if they can check things out? Maybe the tune is too aggressive or something? Do they suggest using O2 sensor spacers?
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