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X11 reading 90 420SEL
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08-29-2011, 10:52 PM
JohnM.
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Join Date: Dec 2007
Location: NorCal
Posts: 1,332
I had this same problem with my 300E. The engine ECU failed in such a way that the car was always in "open loop", thus operating at a fixed duty cycle value all the time and never entering "closed loop".
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