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.

Roy

Answered by ASEMaster6371 (expert)
24,973 answers provided

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.

Response from jamal_325
1 question asked