On-board diagnostics (OBD-II)
Your vehicle is equipped with a computer that monitors the engine’s 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 indicator illuminates, the OBD-II system has detected a malfunction. Temporary malfunctions may cause the service engine soon indicator to illuminate. Examples are:
1. The vehicle has run out of fuel—the engine may misfire or run poorly.
2. Poor fuel quality or water in the fuel—the 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 water—the 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 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 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 indicator on can result in increased emissions, lower fuel economy, reduced engine and transmission smoothness, and lead to more costly repairs.
See also:
Important supplemental restraint system precautions
Airbags DO NOT inflate slowly or
gently and the risk of injury from a
deploying airbag is greatest close to
the trim covering the airbag module.
WARNING: All occupants of the vehicle, includi ...
Vehicle Symbol Glossary
Safety Alert
Fasten Safety Belt
Airbag - Side
Child Seat Tether Anchor
Anti-Lock Brake System
Brake Fluid - Non-Petroleum Based
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Master Lighting Switch
Fog Lam ...
Memory feature (if equipped)
This system allows automatic
positioning of the driver seat, power
mirrors and power tilt/telescopic
steering column (if equipped) to
two programmable positions.
The memory seat control is ...