Check Engine Warning Light - Ford 1996 Escort Manual

Air bag readiness light

Check Engine Warning Light

The Powertrain On-Board Diagnostic II (OBD II)
system consists of the hardware and software
necessary to monitor the operation of the
powertrain. The OBD II system is designed to
check the function of the vehicle's powertrain
control system during normal operation. If an
emission problem is detected, the Check Engine
Warning Light is turned on.
The check engine light
Modification or additions to the vehicle may
cause incorrect operation of the OBD II system.
Additions such as burglar alarms, cellular
phones, and CB radios must be carefully
installed. Do not install these devices by tapping
into or running wires close to powertrain control
system wires or components.
The light comes on briefly when you turn the
ignition key to ON, but it should turn off when
the engine starts. If the light does not come on
when you are driving, have your vehicle
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