Wolf 30" WALL oven model # SO30F/S - ERROR CODE: CHECKSUM

I have an older Wolf 30" wall oven model # SO30 F/S and am getting the following error code of : CHECKSUM....I cannot find what this may be in the manual, it just says to call service. Has anyone had this and what was the issue and how hard was it to fix $$$?

via Wolf 30" WALL oven model # SO30F/S - ERROR CODE: CHECKSUM
by FLEA