1998 BMW 540i Repair Question
BMW 540i Engine Problem
with all those systems going haywire, it sounds like a control issue from the pcm. you will need a shop with a scan tool to monitor these functions when this happens to see what codes may be in the system and what systems are showing these faults.
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thank you ASEMaster6371 for your replay
there is An important point not mentioned previously in last post . I've replaced my oem radio system before this issues com up and installing new After market system (Dynavin D99A for bmw e39 ) with ibus unit . the unit work normal with all option's PDC and OBC features.So it was my belief that the problem is from this unit and I worked the following removed the ibus unit that com whit . and unplug main harness from D99 . today driven my car for 35 mile whit no issues . Could this be the cause of the problem? if this.. is it cause a permanent damage to ecm or other modules .
thank you for your help.
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