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1999 Audi A6 O2 Sensor CEL


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oldman13
New User

Jun 17, 2023, 7:01 AM

Post #1 of 2 (1390 views)
1999 Audi A6 O2 Sensor CEL Sign In

I purchase this Audi last year for my wife who drives it only 2,000-3,000 miles a year. It looks amazing for 240,000 miles. The PO owned for 18 yrs and kept up with maintenance but the CEL has been on for 5 yrs.

It doesn't affect how it drives but I suspect the MPG would be better if I had the O2 sensors changed. The 2.8 V6 is not a race engine but it is fine for a grocery-getter. Other than the obnoxious light on the dash, it starts fine, runs and no indication of a problem.

I can't see spending $500 bucks to have the O2 sensors changed. Even if it increased MPG significantly, it would take 5+ years of less gas cost to break even. If I were younger than 78, I'd do it myself, but those days are gone.

Any thoughts on just driving and ignoring the CEL?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 17, 2023, 7:10 AM

Post #2 of 2 (1387 views)
Re: 1999 Audi A6 O2 Sensor CEL Sign In

Where did you get the idea that it needed 2 0/2 sensors?

Have you even had the stored codes read?



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