CEL - EVAP emission control system
01-16-2009, 06:38 AM
#1
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CEL - EVAP emission control system
I have a Ross Tech VCDS (latest version) and it pulled 2 fault codes on my 2001 A8L (36,000 miles) the 2 codes are 16826- EVAP Emission Control Sys. Small Leak i Intermittent and 16839 EVAP System: Large Leak Detected.
What am I looking at as far as repair costs, if anyone can tell me, your help is greatly appreciated. By the way the Ross Tecg VCDS is worth it's weight in gold.
What am I looking at as far as repair costs, if anyone can tell me, your help is greatly appreciated. By the way the Ross Tecg VCDS is worth it's weight in gold.
01-16-2009, 08:57 AM
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I used to get a "Small leak" code, but it went away almost on its own...
The gas cap has a check valve in it. The leak seemd to disappear after I cleaned the gas cap and gas cap gasket. Maybe just anecdotal but that was 2 years ago.
I never had a "large leak" code - but a loose gas cap could possibly give you that.
I never had a "large leak" code - but a loose gas cap could possibly give you that.
01-16-2009, 11:22 AM
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Re: Reset the codes, then see if they recur, before you do anything.
I always make sure the gas cap is on tight, I cleared the codes, will see it recurrs. I don't think it is anything that would damage the engine.
01-16-2009, 12:39 PM
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Re: I had the "small leak leak code" dealer performed this work---->
Your codes are different, you had a valve sticking open. How much did the dealer charge for the service performed??
Thanks
Thanks
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01-17-2009, 08:43 AM
#8
I think I've replaced that part twice on my A8, and that is a possibility.
There's a test for it in the Bentley, IIRC. Around $80 or $100 for the part, also IIRC, and very easy to replace. It's high up, in the engine compartment, near the firewall on the passenger side.
