check engine light
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AudiWorld Member
Joined: Sep 2009
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check engine light
i have a 2003 tt 1.8t with 56k miles on it. i'm the second owner of this car. i got the fluids flushed at the dealership, oil changes every 4k miles, and did tune up at 50k. my check engine light turned on, both 02 sensors have been changed, and my mechanic just changed the 4th cylinder, but the check engine light is still on. anyone have any ideas what might be wrong with it?
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AudiWorld Member
Joined: Sep 2009
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so far they didn't find any leaks....and they checked the MAF 
They're going to trying to replace the 02 sensor again (might be faulty?). but other than that are there other common problems that I should look out for for 03' 1.8t cpe with 56k miles? this is my first audi and i really don't know how else to take care of it besides the on time oil change, tune up, and use synthetic oil. any suggestions or advice is greatly appreciated!
They're going to trying to replace the 02 sensor again (might be faulty?). but other than that are there other common problems that I should look out for for 03' 1.8t cpe with 56k miles? this is my first audi and i really don't know how else to take care of it besides the on time oil change, tune up, and use synthetic oil. any suggestions or advice is greatly appreciated!
AudiWorld Super User
Joined: May 2002
Posts: 5,138
Likes: 4
From: Redmond WA
Maybe you should change your mechanic first!
The CEL should have been read.
What was the code(s) that was stored?
Here's a list of codes.There are a lot of them so it's unwise to guess.
http://www.bentleypublishers.com/tec....dtc.table.htm
If your mechanic is competent he needs to have access to the Audi / VW factory code reader or a Vag.com.
Not just a generic scan tool.Something than can read specific audi codes (not just P -codes).
The tools can also monitor MAF and oxygen sensor operation.
If this is "hard" fault it should be easy to find.
If you prefer you can keep handling over the $$$ while your mechanic plays "guess the part". Then sell the car when you have had enough and then tell everyone what cr@p cars Audis are.;-]
What was the code(s) that was stored?
Here's a list of codes.There are a lot of them so it's unwise to guess.
http://www.bentleypublishers.com/tec....dtc.table.htm
If your mechanic is competent he needs to have access to the Audi / VW factory code reader or a Vag.com.
Not just a generic scan tool.Something than can read specific audi codes (not just P -codes).
The tools can also monitor MAF and oxygen sensor operation.
If this is "hard" fault it should be easy to find.
If you prefer you can keep handling over the $$$ while your mechanic plays "guess the part". Then sell the car when you have had enough and then tell everyone what cr@p cars Audis are.;-]
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