Malfunction Indicator Lamp - Honda 2005 Accord Owner's Manual

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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 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.
If the indicator comes on repeatedly,
even though it may turn off as you
continue driving, have the vehicle
checked by the dealer as soon as
possible.
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.
This indicator may also come on
along with the ''D'' indicator.
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.

Malfunction Indicator Lamp

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 284 ).
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