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Old 02-13-2013, 01:14 PM
ard ard is offline
Resident Curmudgeon
Location: CA
 
Join Date: Jul 2009
Posts: 9,666
Mein Auto: '12 X5 35d/E39M5/996TTX50
Q- usually when a car is over-boosing, or the AFR gets dangerously lean, the DME/DDE goes to a failsafe 'reduced output' mode. In the older gas motors we called this "limp mode" as there was not message to hthe driver. Now you get various text displays- my recollection is diesel and gas have different warnings. But the key is that when the car goes into limp it is doing it to be protective..AND this can point you as to what the underlying cause is (boost, sensors, fuel, air leaks, ect)

Anyway, for RJ- something is wrong and is 'fooling' the DDE, AND fooling the TestPlans they run...AND fooling Puma....
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