Cadillac 1996 DeVille Owner's Manual page 133

If the Light Is Flashing'
The following may prevent more senous damage to
your vehicle:
If the Light Is On Steady
You may be able to correct the emission system
malfunction by considering the following:
e
Reduce vehicle speed.
Avoid hard accelerations.
Avoid steep uphill grades.
0
If towing a trailer, reduce the amount of cargo being
hauled as soon as it is possible.
Did you just drive through a deep puddle of water?
If so, your electrical system may be wet. The condition
will usually be corrected when the electrical system
dries out. A few driving trips should turn the light off.
Are you low on fuel?
As your engine starts to run out of fuel, your engine
may
not run as efficiently as designed since small amounts of
air are sucked into the fuel line causing a misfire. The
system can detect this. Adding fuel should correct this
condition. Make sure to install the fuel cap properly. It
will take a few driving trips to turn the light off.
If the light stops flashing and remains on steady, see "If
the Light Is On Steady" following.
If the light continues to flash, when it is safe to do so,
stop the vehicle. F W your vehicle in PARK (P). Turn the
key off, wait at least 10 seconds and restart the engine.
If the light remains on steady, see "If the Light Is On
Steady" following. If
the
light is still flashing follow the
previous steps, and drive the vehicle to your dealer or
qualified service center for service.
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