2006 Honda Accord Owner's Manual - Page 248

Malfunction Indicator Lamp If you have recently refueled your vehicle, the cause of this indicator coming on could be a loose or missing fuel fill cap. Check the cap or replace it. Tightening the cap will not make the indicator turn off immediately; it can take several days of normal driving. If the indicator remains on or the fuel cap was not loose or missing, have the vehicle checked by the dealer as soon as possible. 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's battery has been disconnected or gone dead, these codes are erased. It can take several days of driving under various conditions to set the codes again. To check if they are set, turn the ignition switch to the ON (II) position, 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 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 State Emissions Testing for more information (see page 275). If you keep driving with the Malf unction Indicator Lamp on, you can damage your vehicle's emissions controls and engine. Those repairs may not be covered by your vehicle's warranties. This indicator may also come on with the ''D'' indicator. 252