2004 Honda Civic Owner's Manual - Page 199

2004 Honda Civic Manual

Page 199 highlights

Malfunction Indicator Lamp If the indicator comes on while driving, it means one of the engine's emission 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 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 turn off immediately; it takes at least three days of normal driving. If the indicator remains on, or the fuel cap was not loose or missing, have your vehicle checked by the dealer as soon as possible. NOTICE: If you keep driving with the Malf unction Indicator Lamp on, you can damage your vehicle's emission controls and the engine. Those repairs may not be covered by your vehicle's warranties. Readiness Codes 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. 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. 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. If it then goes off, the readiness codes are set. If it blinks 5 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 State Emissions Testing for more information (see page 215 ). 196 Taking Care of the Unexpected

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If the indicator remains on, or the
fuel cap was not loose or missing,
have your vehicle checked by the
dealer as soon as possible.
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.
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.
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. If it then goes off, the
readiness codes are set. If it blinks 5
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 State Emissions Testing for
more information (see page
).
If the indicator comes on
while driving, it means one
If you have recently refueled your
vehicle, the indicator coming on
could be 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 turn off
immediately; it takes at least three
days of normal driving.
215
Malfunction Indicator Lamp
Taking Care of the Unexpected
Readiness Codes
196
NOTICE:
If you keep driving with the
Malfunction Indicator Lamp on, you
can damage your vehicle’s emission
controls and the engine. Those repairs
may not be covered by your vehicle’s
warranties.
of the engine’s emission 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.