Thread: Code 27B8
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      04-20-2026, 02:48 PM   #11
Kross
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Drives: ESS e90 M, m760
Join Date: Feb 2012
Location: Baltimore

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Sorry to dig up an old post but this one has been most informative so far so I'm hoping for some help with a similar problem.

08 e90 m3 + ESS VT595 + do88 big pack

I'm looking for help diagnosing and fixing my radiator fan not kicking on, causing overheating at idle.

I'm only getting 7 volts to the fan plug with the car running and AC on full blast - I blieve I'm supposed to be getting continuous 12v.

I've checked fuse 88 behind the glove box. Looks ok, a little corrosion, gett 12v+ on both leads.

Not really sure where to go from here, any help is appreciated!
Appreciate 0