Mechanics

BMW 740 THERMOSTAT PROBLEM

1998 BMW 740 • 140,000 miles

Its al davison again quick question my friends 740 we replaced the thermostat the water pump and the four post sending unit on the pump every thing is fine no problems no cel but when you check for fault codes 8b comes up on the peake tool electric thermostat control final stage what does that mean how to fix thank you
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Al davison
November 7, 2012.



Use a real OEM thermostat or recheck the wiring from the temp sender all the way back to the E-box, it may be fried.

Dr. Hagerty
Nov 7, 2012.
Hi dr. It is a oem thermo ill check the wires and let you know thanks al

Tiny
Al davison
Nov 7, 2012.
11.8 ohms of resistance at the connector of the Tstat

Dr. Hagerty
Nov 8, 2012.
Thank you dr. I will ceck that out and I will let you know what I find thank you for your time and trouble al

Tiny
Al davison
Nov 8, 2012.
: -)

Dr. Hagerty
Dec 7, 2012.