FORD 1999 Explorer - Manual (Page 6)

WARNING LIGHTS AND CHIMES
Check engine
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.
The Check Engine indicator light illuminates when the ignition is first
turned to the ON position to check the bulb. If it comes on after the
engine is started, one of the engine’s emission control systems may be
malfunctioning. The light may illuminate without a driveability concern
being noted. The vehicle will usually be drivable and will not require
towing.
What you should do if the check engine light illuminates
Light turns on solid:
This means that the OBD II system has detected a malfunction.
Temporary malfunctions may cause your Check Engine 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.
C
0
1
2
3
4
5 6
RPMx1000
ABS
!
BRAKE
CHECK
ENGINE
FUEL
RESET
E
F
H
H
H
P R N D 2 1 THEFT
SPEED
CONT
4WD
HIGH
4WD
LOW
O/D
OFF
L
L
10 MPH
20
50
60 70
30
40
80
90
km/h
0 0 0
10 1
00 1
20 1
0 0 0 0 0 0 40
60
80 100 120
140
160
180 20
DOOR
AJAR
CHECK
GAGE
CHECK
SUSP
CHECK
ENGINE
Instrumentation
6