A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

CEL on and no recognizable problems

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Old Jun 3, 2008 | 04:36 AM
  #1  
jschrauwen's Avatar
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From: Frankford, Ontario, Canada. 08 R8TT, 08 A5, 90 TT 300ZX, Ducati TT2
Default CEL on and no recognizable problems

I've only had the car for a month and for the last 2 days the CEL has been constantly on. I see and experience no issues or problems with starting, driving or other functions. I've been using Sunoco 94 octane since I've had it. Could this cause issues? Is there a self test I could do to find any ECU codes?
Thanks,
John

2000 A4 2.8 Quattro Tip
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Old Jun 3, 2008 | 05:03 AM
  #2  
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Default Find someone with a Vag-Com to scan the car for you. You could have

had a simple misfire which might have tripped the light.
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Old Jun 3, 2008 | 06:36 AM
  #3  
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From: Frankford, Ontario, Canada. 08 R8TT, 08 A5, 90 TT 300ZX, Ducati TT2
Default Unfortunately, rural living and lack of other known users doesn't permit.

Thanks Tyler
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Old Jun 3, 2008 | 06:49 AM
  #4  
Joey T
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Default Buy a VAG-COM and fix it yourself.

The intarweb is no substitue for self reliance.
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Old Jun 3, 2008 | 07:43 AM
  #5  
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Default As the others have said, step one is to extract the codes.

Sometimes a local auto parts store will scan the codes as a free service.
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Old Jun 3, 2008 | 08:24 AM
  #6  
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Default anyone have the link to the Vag-Com locater? Maybe someone will post

and there could be someone close to you?
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Old Jun 3, 2008 | 09:20 AM
  #7  
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From: Frankford, Ontario, Canada. 08 R8TT, 08 A5, 90 TT 300ZX, Ducati TT2
Default

Thanks.
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Old Jun 3, 2008 | 02:40 PM
  #8  
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From: Frankford, Ontario, Canada. 08 R8TT, 08 A5, 90 TT 300ZX, Ducati TT2
Default I stopped at my Audi shop to have the code(s) checked.

It was an 02 sensor. Just to confirm that it may be a faulty code (since there was an ancilliary sub code to the 02) we cleared the codes and are going to see if it re-appears agin. As of yet, no return of code on the 20km return drive home.
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Old Jun 4, 2008 | 04:57 PM
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Default Look here for VAG locator

<ul><li><a href="http://vag-tool.kicks-***.net/">http://vag-tool.kicks-***.net/</a</li></ul>
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Old Jun 6, 2008 | 04:17 AM
  #10  
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From: Frankford, Ontario, Canada. 08 R8TT, 08 A5, 90 TT 300ZX, Ducati TT2
Default Sounds like you were right.

I had the 02 code(s) cleared 2 days ago and it's not returned as of yet.
Thank you.
John
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