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post #1 of 7 Old 02-11-2008 Thread Starter
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Check Engine Light

It appears everytime the ambient temperature drops below 0 degrees farenheit my check engine light comes on then goes off once the temp rises above 10 degrees or so. The dealer replaced one of the exhaust sensors approx 3 months ago. Has any one else seen this?

2004 V10, locking diffs, air suspension, nav, 19" Atheos with Nokian WR's.
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post #2 of 7 Old 02-13-2008 Thread Starter
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Bump....Anyone?

2004 V10, locking diffs, air suspension, nav, 19" Atheos with Nokian WR's.
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post #3 of 7 Old 02-13-2008
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VAG tool would come in handy to see what the specific code is...hard to diagnose otherwise.

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post #4 of 7 Old 02-13-2008 Thread Starter
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Took it in to the dealer for routine service and a coolant leak. Turns out the code came up as a misfire on cyl 1 and 8. Probably due to the -15 temps we had over the weekend. It had to sit outside overnight and ran a little rough when I first started it.

2004 V10, locking diffs, air suspension, nav, 19" Atheos with Nokian WR's.
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post #5 of 7 Old 02-13-2008
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They check for water in the fuel?.not sure if you do this already but I always use diesel conditioner on my TDI. Always helpful in the extra cold weather...

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post #6 of 7 Old 02-14-2008 Thread Starter
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I have been using Power Service in the white bottle since November and use the silver bottle in the summer. This is in addition to the diesel already being blended here for service down to -20 F.

2004 V10, locking diffs, air suspension, nav, 19" Atheos with Nokian WR's.
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post #7 of 7 Old 02-15-2008
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Quote:
Originally Posted by chrislaw92 View Post
It appears everytime the ambient temperature drops below 0 degrees farenheit my check engine light comes on then goes off once the temp rises above 10 degrees or so. The dealer replaced one of the exhaust sensors approx 3 months ago. Has any one else seen this?
Funny you should mention this - I had a bout with an electrical gremlin right after an extensive rain event and cold weather here. Got the Brake Fault workshop, a TPMS warning, and a check engine light as well. After the next morning only the check engine light remained, and then that went away after a day more and I am left wondering what really happened if not some kind of ground fault?

Geoff
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