Durametric Fault Code 23C4

[finestjammy]

Hi All

I recently purchased a Durametric enthusiast edition. Plugged it in and the only code that crops up is 23C4 under the DME module. The fault states:

'Fault entry in specified control module
Value below lower limit value'

This is on a 987.2 Cayman on the Siemens SDI3 engine module.

I have googled but can't find anything.

Any help appreciated.

Thanks

James.