Greg Albers
Active member
I just replaced the heater core in my 1990 L98 and had the dash apart. I now have a SYS code where the mpg readings usually are and the speedometer reads "0" all the time. The rest of the readings are fine, tach, oil pressure, temp etc. As far as I can tell everything else is working fine, AC, radio (Bose), lights, etc.
Any ideas?
Any ideas?