Chevrolet express 2001 用户手册

Some state/provincial and local governments have 
or may begin programs to inspect the emission 
control equipment on your vehicle. Failure to pass 
this inspection could prevent you from getting a 
vehicle registration.

Here are some things you need to know in order to help
your vehicle pass an inspection:

Your vehicle will not pass this inspection if the
SERVICE ENGINE SOON or CHECK ENGINE light is
on or not working properly.

Your vehicle will not pass this inspection if the 
OBD (on

-

board diagnostic) system determines that

critical emission control systems have not been
completely diagnosed by the system. The vehicle would
be considered not ready for inspection. This can happen
if you have recently replaced your battery or if your
battery has run down. The diagnostic system is designed
to evaluate critical emission control systems during
normal driving. This may take several days of routine
driving. If you have done this and your vehicle still does
not pass the inspection for lack of OBD system
readiness, see your dealer or qualified service center to
prepare the vehicle for inspection.

If this light comes on or flashes while you are driving,
two things may happen.

First, you won’t notice any difference in engine
performance, but your tail pipe emissions may increase.
Second, your engine may not run properly or may stall
without warning. If either of these things happen, drive
or tow your vehicle to your dealer for service.

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 repaired.