Check Engine Light?
#1
Check Engine Light?
I own a 2001 A6 2.7T, and I have been expiriencing intermittent rough idles. Temperature does seem to play some role (worse when cold), but it is inconsitent. I also have had a 2MPG drop in fuel efficiency the last 2-4 mos. So my question is could it be an O2 sensor, and idle sensor, or some other sensor without triping the check engine light??? Techs please help. Thanks.
#4
RE: Check Engine Light?
Pep boys should be able to give you the codes, now if you're going to keep the car for a while, get a VAG-com, great for diagnozing faults and/or modding our Audis, and finding faulty O2 sensors.
VAG-COM is your friend.
VAG-COM is your friend.
#6
RE: Check Engine Light?
I'm no expert, but I think it could have something to do with the air injection system. From what I understand, there's a pump that sucks air into the system to control how rich the mixture of air and gas is, particularly at various temperatures. If you have a cracked hose (or pipe - I think they may be plastic pipes) you'll get an air leak and the system will become inefficient.
As a result, you'll get a rough idle because it will have trouble controlling the richness of the air/gas mixture.
Hopefully someone who knows better than I do will come along and correct me if I'm wrong.
As a result, you'll get a rough idle because it will have trouble controlling the richness of the air/gas mixture.
Hopefully someone who knows better than I do will come along and correct me if I'm wrong.
#7
RE: Check Engine Light?
can someone help me i am getting a check engine light and i have an after market radio audi says i need original inorder to get the codes does and one know the relay to bypass this?
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