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Old 11-25-2013, 11:54 PM
Join Date: Nov 2013
Location: san jose, ca.
Posts: 1
JStrong76 is on a distinguished road
Temp Gauge malfunction

Hello all. This is my first post here and I hope someone can help me out. My sis has a 2007 X3si with the 3.0L Her temp gauge needle keeps jumping to red even though the car is not overheating and the car goes into limp mode. It usually happens when she uses the heater or AC. It also triggers the check engine light but I forgot to write down the code number. It refers to the thermostat heater circuit malfunction. I have changed the thermostat twice already thinking the first was a defect. Problem still exists.

Can it be air bubbles in the cooling system? Can someone please refer me to the proper bleed procedure? I tried bleeding it by letting it idle on the driveway incline with the rad cap off. I did notice surges in the coolant level.

Can it be the temp sender? Anyone know where it's located because I can't seem to find it.

Any help would be greatly appreciated! Thanks in advance!

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