In all honesty, I'd return it and get a ScanGauge II. In fact, that's exactly what I did. Mine was a faulty unit and even before it started malfunctioning, it didn't display things properly like yours.
You can read about it here: http://www.cruzetalk.com/forum/64-gen1-diesel-general-discussion/132666-scangauge-ii.html
ScanGauge shows everything you could need to know in a simple, affordable unit that can be placed somewhere and is out of the way.
You can read about it here: http://www.cruzetalk.com/forum/64-gen1-diesel-general-discussion/132666-scangauge-ii.html
ScanGauge shows everything you could need to know in a simple, affordable unit that can be placed somewhere and is out of the way.