Adding a leading 0 to incoming HEX data for conversion to binary

Hi aarg,
yes, if you see it in total they are the same number.
Let me try to explain:

0x03 should be 0B00000011
In this message the Bit 1 (so a "0") could represent the status of the blower (on->1 off->0) of the ABS, or so on...
So you see, even though there are only "0000" this could represent the Boolean information on 4 actuators.

Hope I could explain this understandably.