Buick 1994 LeSabre Owner's Manual page 115

Malfunction Indicator Lamp
(Service Engine Soon Light)
SERVICE
ENGINE SOON
SERVICE
ENGINE
SOON
A computer monitors operation of your fuel, ignition
and emission control systems. This light should come on
when the ignition is on, but the engine is not running, as
a check to show you it is working.
If it does not come
on
at all, have it fixed right away. If
it
stays on, or it comes on while you are driving, the
computer is indicating that you have a problem. You
should take your vehicle in for service soon.
1
NOTICE:
If you keep driving your vehicle with this light on,
after a while the emission controls won't work as
well, your fuel economy won't be as good and
your engine may not run as smoothly. This could
lead to costly repairs not covered by your
warranty.
113