On-board diagnostics (OBD-II)

Your vehicle is equipped with a computer that monitors the engines emission control system. This system is commonly known as the on-board diagnostics system (OBD-II). The OBD-II system protects the environment by ensuring that your vehicle continues to meet government emission standards. The OBD-II system also assists your authorized dealer in properly servicing your vehicle. When the service engine soon illuminates, the OBD-II system has detected indicator
illuminates, the OBD-II system has detected a malfunction. Temporary malfunctions may cause the service engine soon Examples are: indicator to illuminate.
Examples are:

1. The vehicle has run out of fuelthe engine may misfire or run poorly.

2. Poor fuel quality or water in the fuelthe engine may misfire or run poorly.

3. The fuel fill inlet may not have been properly closed. See Easy Fuel no cap fuel system in this chapter.

4. Driving through deep waterthe electrical system may be wet.

These temporary malfunctions can be corrected by filling the fuel tank with good quality fuel, properly closing the fuel fill inlet or letting the electrical system dry out. After three driving cycles without these or any other temporary malfunctions present, the service engine soon next time the engine is started. A driving indicator should stay off the
next time the engine is started. A driving cycle consists of a cold engine startup followed by mixed city/highway driving. No additional vehicle service is required.

If the service engine soon indicator remains on, have your vehicle
indicator remains on, have your vehicle serviced at the first available opportunity. Although some malfunctions detected by the OBD-II may not have symptoms that are apparent, continued driving with the service engine soon result in increased emissions, lower fuel economy, reduced engine and indicator on can
result in increased emissions, lower fuel economy, reduced engine and transmission smoothness, and lead to more costly repairs.

    See also:

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