BMW Repair Questions? Ask a Mechanic for Answers ASAP
no tests have been done yet it only happened other day when the ccv oil separator was changed?
the most common cause of multi system issues like this is a voltage problem so the alternator and battery needs to be tested first and all cables/connections checked
if the voltage and charging system are okay, then this could be a wiring issue or failed module
however, as you have multiple modules involved showing faults, proper hands on checks and test plans will need to be carried out using either a factory BMW tester or by unhooking module one by one, so this will need to be done before the issue can be 100% identified
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