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If your vehicle battery has been
disconnected or gone dead, these
codes are erased. It takes at least
three days of driving under various
conditions to set the codes again.
If the indicator comes on repeatedly,
even though it may go off as you
continue driving, have your vehicle
checked by a dealer as soon as
possible.
If this indicator comes on
while driving, it means one
of the engine’s emissions control
systems may have a problem. Even
though you may feel no difference in
your vehicle’s performance, it can
reduce your fuel economy and cause
increased emissions. Continued
operation may cause serious damage.
If you have recently refueled your
vehicle, the indicator coming on
could be due to a loose or missing
fuel fill cap. Tighten the cap until it
clicks at least three times.
Tightening the cap will not turn the
indicator off immediately; it takes at
least three days of normal driving.
Your vehicle has certain ‘‘readiness
codes’’ that are part of the on-board
diagnostics for the emissions
systems. In some states, part of the
emissions testing is to make sure
these codes are set. If they are not
set, the test cannot be completed.
To check if they are set, turn the
ignition to ON (II), without starting
the engine. The malfunction
indicator lamp will come on for 20
seconds.Ifitthengoesoff,the
readiness codes are set. If it blinks
five times, the readiness codes are
not set. If possible, do not take your
vehicle for a state emissions test
until the readiness codes are set.
Refer to
for more information (see page ).
192
Malfunction Indicator Lamp
Readiness Code
State Emissions Testing
Taking Care of the Unexpected
171
If you keep driving with the
Malfunction Indicator Lamp on, you
can damage your vehicle’s emissions
controls and the engine. Those repairs
may not be covered by your vehicle’s
warranties.
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