HONDA 2005 Civic Coupe - Owner's Manual - Manual (Page 203)

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 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.
If the 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 the indicator comes on repeatedly,
even though it may turn off as you
continue driving, have the vehicle
checked by your dealer as soon as
possible.
To check if they are set, turn the
ignition switch 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
). 222
Malfunction Indicator Lamp
Readiness Codes T
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If you keep driving with the
Malf unction 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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