I just got my 97 A4 about 3 months ago....Not that long ago my check engine light came on but went back off a couple days later..but now it drags in the rpms...Could it be a sensor goin...this is my first Audi so i need some help..

 

could you be a little more specific?

 

Well first off the car is auto..when i went up hill it would hold the gear longer i guess you could say.. now i does it even if it's a small incline..but other times it drives perfectly fine... I did have it into to Audi dealer for a new ignition and new upper control arms and tie rods just 3 days before it started to do all this... someone i know said it could be the O2 sensor goin..but i thought i would get other peoples advice.

 

1st off can you please tell us if its a 1.8T or 2.8?

 

I am sorry it's a 1.8t.

 

Try to find someone with a VAG-COM to pull some codes... if your CEL came on your might have a code stored. May be too lean because of a vaccum leak... or bad O2 sensor...

Have you done a tune up recently???

Oil change? Air Filter? Spark Plugs? All Fluids (not the cause but good to do)

I would think it to be a vaccum leak or a bad 02 sensor

 

I did an oil change on it soon after i got it..I didn't do any of the other things when it was at the dealer i had them check everything over...But i will check everything over again and maybe change the plug and airfilter to be on the safe side...now if it is a vacuum leak how much is that to fix and an O2 sensor too.