For the past 6 months I have been getting a “Check Engine Light” for an 02 sensor at 55K miles.

I changed both 02 sensors, tried erasing CODE with VAG COM, nothing happen, error still exist.

Tried researching online about fixing problem but could not find any answers.

So finally I called Audi Service and they said that They were getting a lot of issues for the past 6 months due to bad gas quality.

They suggested me to feed my Audi with half Racing GAS and half normal gas. (I only put supreme, Chevron, ever since I bought Audi) due to Audi needs a higher octane due to poor gas quality. This usually work but they said if this doesn’t work for a month then bring car in for more troubleshooting.

I don’t have that kind of money to spend about $8 bucks a gal……..

So I decided to switch gas to SHELL, V-power, I waited until my Audi was about empty and filled tank up.

The next day “Check Engine Light” was gone.

Interesting……….tank was good until a week, then I switched back to Chevron just to test their gas.

“Check Engine Light” back on………

After tank was empty, filled tank with SHELL V-power……..”Check Engine Light” GONE.

In my case, Chevron was feeding my Audi gas generic fuel for the past 6 months.

If you have an 02 sensor error, try changing gas before you spend $$ on a new one.


01 A4 1.8T quattro TIP

 

Heh im glad theres alot of shells here in north texas which is the only thing i put in my car. Good to know.

 

Shell is good??? My car was detonating from theirs gas.

 

Compared to every other gas station shell is the **** around here.

 

guess im filling up at shell tomorrow morning.

 

mobil/exxon, shell, and amoco/BP are my preferred fill ups. wouldn't get other gas if it was free, i do like vp race gas tho, VP red, vp 104.

 

Yeah shell is best as far as im concerned.

 

I've always really liked Sunoco, especially since they sell 94 octane and race gas.

 

Actually, Audi Service suggested me to MATRIX for race gas but they were out, so they suggested me to call other company who carries ras gas.

All suggested SUNOCO.........

 

Huh...at least you didn't have to sink much money to find out, but thanks for the tip.