Warning Lights And Chimes; Check Engine; What You Should Do If The Check Engine Light Illuminates - Mercury Mountaineer 2001 Owner's Manual

Instrumentation

WARNING LIGHTS AND CHIMES

CHECK
C
ENGINE
CHECK
FUEL CAP F
E

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.
3. The fuel cap may not have been properly installed and securely
tightened.
8
CHECK
GAGE
5
6
4
RPMx1000
3
H
2
1
0
ABS
P
!
BRAKE
DOOR
AJAR
60 70
50
80
0 0 0
40
90
100
80
120
60
140
30
1 00
0 0 0 0 0 0
40
160
20
1 10
180
20
20
10 1
km/h
MPH
R N D 2 1
THEFT
CHECK
ENGINE
H
SPEED
CONT
L
4WD
HIGH
H
4WD
LOW
L
CHECK
SUSP
O/D
OFF