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Old 01-08-2013, 08:49 AM   #4
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Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 16,061
My Ride: 330CiC, M5, X5
Thanks for the the replies.

I have not had a chance to determine how low the temp is before the gauge shows 12 o'clock, I just need a cold start and bring up the OBC display and watch when the gauge is dead center, however, I believe around 75C is probably the correct number.

Again, if you get thermostat codes, other than the heater element open, you have likely had issue for a LONG while.

This is the only time of year you can reliably determine if your stat is soft for most of us, at least in the Northern Hemisphere above the 30th parallel!
Solve your misfires, lean codes, rough idle -

Fuel pump failures -

Temp Info -

Hidden OBC Menu - Check Voltage, Temp, Fuel Level -

E46/E39 GM5 Door Lock Info -

Lower hose temp switch O-ring - BMW #13621743299
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