Hi Uli,
I assume you’ve checked on the Intel site, too? I saw this thread:
https://software.intel.com/en-us/forums/intel-firmware-engine/topic/603829
which doesn’t exactly cover your error code, but it seems that they sometimes have either a solution or can help you with that. It does not look like your issue is a kernel related one.
Sorry, if you’ve already researched in that direction and had no success …