Hmm...I did have to remove it from the box (still connected ) when I cut the battery box, but believe I have it oriented correctly (Has an imprint saying Upper or Top on the module).
Plus if it was a TOS, wouldn't a C23 error code kick out instead of C42?
Oh, oops my bad.
I dunno about the c42 then. Usually when people mess around the the battery box area the mess up the TOS.