2003 2.0tdi with auto lights, i have previously done some coding to the car and earlier i got into the 09 CE module to code foglights as drls and before i changes anything i had to abort to go out, about an hour later i went back to carry on and i couldnt access the long coding menu and an error came up?
i know the cem can lock you out for a while...could this be it? my lights still work fine but i cnt change the long code for headlights etc

this is the fault i got
Diagnostic Interface for Data Bus (J533)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 5
Fault Frequency: 5
Reset counter: 104