1998 Bmw 740 Al Davison Again Quick Friends Replaced Thermostat Water

1998 BMW 740
140,000 MILES
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AL DAVISON
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  • 6 POSTS
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
Nov 7, 2012 at 4:38 PM
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DOCHAGERTY
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  • ASE Certified Mechanic
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.
Nov 7, 2012 at 5:25 PM
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AL DAVISON
  • MEMBER
  • 6 POSTS
hi dr. it is a oem thermo ill check the wires and let you know thanks al
Nov 7, 2012 at 6:13 PM
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DOCHAGERTY
  • ✓ASE Certified Mechanic
  • 9,606 POSTS
  • ASE Certified Mechanic
11.8 ohms of resistance at the connector of the Tstat
Nov 8, 2012 at 8:28 AM
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AL DAVISON
  • MEMBER
  • 6 POSTS
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
Nov 8, 2012 at 9:32 AM
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DOCHAGERTY
  • ✓ASE Certified Mechanic
  • 9,606 POSTS
  • ASE Certified Mechanic
:-)
Dec 7, 2012 at 5:19 AM
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