Quote:
Originally Posted by wpoll
I watched closely when starting up the car this morning - no check engine lamp is lit when the ignition is turned on, during the cluster start-up cycle.
It DOES work, as it lights up during the cluster check.
A quick way to check it's operation would be to pull the vacuum line from the EGR (and plug it). Within a drive cycle or two you should see the check engine light come up. You will also have an EGR code in the DDE fault memory.
I'd try this myself, purely for research, but it's virtually snowing outside, so no.... 
My 2005 3.0d has very little in the way of emissions gear, no swirls flaps, no DPF, only an un-monitored cat.... came like from the factory.... so I'm guessing different emission levels require different DDE/IKE firmware, which present minor differences in operation. |
Didn't he already have an active EGR problem which the dealer rectified with a new EGR valve and still the warning light was not on.
Same vehicles on different market areas have different DDE software and this check engine light can be affected. Also there is a difference in EU3 vs. EU4 versions. I have EU4 with working check engine light. I assume you have EU3 if you don't have DPF. Just wondering which version the thread starter has.
Actually the EU4 version with DPF has a different DDE version 6 and EU3 versions have DDE 5.
https://www.realoem.com/bmw/enUS/sho...diagId=13_1223