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Old 11-21-2011, 03:46 PM   #4
TheMadChigga
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Take a look at this link:

http://www.ideaphile.com/bmw/540-obc.html

it shows you how to access your OBC and get a more accurate read out, KTMP read out is option 7 once you enter your 7 digit vin sum.

If indeed your temperature is skyrocketing when your idling, then it may be worth to check out your belt, then pulley, work your way from the cheapest fix up.
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