not permitted to intentionally remove an emission
control device or prevent it from working.
Information about your vehicle’s emission system is
on the Vehicle Emission Control Information Decal
located on or near the engine. This decal identifies
engine displacement and gives some tune up
specifications.
Please consult your
Warranty Guide
for complete
emission warranty information.
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). This OBD-II system
protects the environment by ensuring that your
vehicle continues to meet government emission
standards. The OBD-II system also assists the
service technician in properly servicing your vehicle.
When the
Check engine/Service engine soon
light
illuminates, the OBD-II system has detected a
malfunction. Temporary malfunctions may cause
your
Check engine/Service engine soon
light 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.
3. The fuel cap may not have been securely
tightened.
These temporary malfunctions can be corrected by
filling the fuel tank with good quality fuel and/or
properly tightening the fuel cap. After three driving
cycles without these or any other temporary
malfunctions present, the
Check engine/Service
engine soon
light should turn off. (A driving cycle
consists of a cold engine startup followed by mixed
city/highway driving.) No additional vehicle service is
required.
If the
Check engine/Service engine soon
light
remains on, have your vehicle serviced at the first
available opportunity.
2004 04- Mustang
(mus)
Owners Guide (post-2002-fmt)
USA English
(fus)
Maintenance and Specifications
196
