Too add to what Jack said:
If there is no communication, you will get the "no communication" indicator.
If there are codes (active, pending, history) the scanner should display them regardless of fuel used.
To verify this, put the scanner in live data mode, if it displays live data, then the scanner os OK.
There are 4 types of codes, "P" (powertrain), "C" (chassis), "B" (body) and "U" (Commnication codes). The snap-on should read all 4.
If no codes are displayed, then you have a problem with the SES light circuit.
Friday, November 14th, 2008 AT 6:33 AM