Northstar Engines and System Technical Discussion Discussion, 96 sts check engine light on but no codes in Cadillac Engine Technical Discussion; Yep kind of funny check engine is on, but when i check for any codes all are in history. any ...
Automobile(s): White Diamond '03 DHS (with DTS floor shift)
Re: 96 sts check engine light on but no codes
One of the history code was set in the last 3 ignition cycles and it is likely an emission related code that turned on the light. The light will go out after 3 ignition cycles if the fault is not detected again. Clearing the codes will also clear the historical codes.