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My wife has a 2004 New Beetle that has a recurring CEL. When I put the VAG on it I get DTC P2181. All 3 times the freeze frame data shows speed around 26mph, rpm about 2650, and ECT of 340 to 349 Deg. F. Coolant level is good, no evidence of leaks, both fans run fine. Engine reaches normal temp in a few minutes. Never had the red coolant light at all, even when these DTC's set.
I just ran the car for 40 minutes at 2600-3600 rpms. Live data showed coolant temp between 189 to 205 deg. F. Right now I am thinking an intermittent fail on the coolant sensor. Anyone have any thoughts on this problem?
 
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