Instrumentation, Service engine soon – Lincoln 1999 Town Car User Manual

Page 6

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WARNING LIGHTS AND CHIMES

Service engine soon

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 the
service technician in properly servicing your vehicle.

The Service Engine Soon 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 Service Engine Soon light illuminates

Light turns on solid:

This means that the OBD II system has detected a malfunction.

Temporary malfunctions may cause your Service Engine Soon light to
illuminate. Examples are:

1. The vehicle has run out of fuel. (The engine may misfire or run
poorly.)

10

20

30

40

50

60

70

80

90

100

120

20

60

80

40

100

120

160

140

180

P

R N D 2 1

MPH

km/h

110

H

F

E

1

2

FILL ON

LEFT

<

AIR

BAG

CHECK

TRAC

SERVICE

ENGINE

SOON

TRUNK AJAR DOOR AJAR
TRAC OFF AIR SUSPENSION

O/D OFF TRAC ACTIVE
SPEED CONTROL COMPASS

km

CIRCLE
SLOWLY

WASHER FUEL ECON AVG
LTR/100km FUEL REMAIN

DIST TO EMPTY

AVG SPEED

TRIP A B

E/M

km MILES/GAL

BRAKE

SERVICE

ENGINE

SOON

Instrumentation

6

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