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      09-18-2009, 07:53 PM   #1
Enlisted Member

Drives: 2008 328xi
Join Date: Jun 2009
Location: South NJ

iTrader: (0)

Any BMW Techs That Can Help - Fault 2AD8 "Implausible"

2008 328xi is NOT under warranty or I would have this at the dealer.

I'm getting a recurring SES light due to fault 2AD8 (EAC Sensor Monitoring/Control). There is a SBI 121607 describing this issue for cars produced up to 8/2007 (mine was produced 4/2008) stating implausible temperature differences at startup with the fix being a ProgMan update.

I'm getting this while driving, not at startup.

The fault events show the engine temp around 98 - 101 degrees Celsius, coolant temp between 55 - 75 degrees Celsius, and ambient temp around 17-18 degrees Celsius.

The car is a salvage unit. Radiator was replaced with used unit from 2006 328xi and I transplanted a sensor in the original radiator into the 2006 radiator. The thermostat and housing were also replaced with new.

I'm at a loss on what to do next. I'm considering replacing the lower hose temp sensor and the engine temp sensor but I don't want to just throw parts at it.

Any help would be appreciated.