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You can fix the Service Engine Soon light on your 1999 Taurus yourself at home using an OBD scan tool. OBD stands for On-Board Diagnostics system. This is the computer that stores the trouble codes sent to it by sensors positioned throughout the vehicle. Its job is to indicate what is going on in your vehicle and when it needs routine servicing. When you see the Service Engine Soon light flash on your instrument panel, you should have your Taurus serviced before you attempt to reset the system and turn off the light.

Instructions

1

Find the open port that is next to the fuse panel on the drivers side of the dashboard.

2

Plug the OBD scan tool into the open port.

3

Put the key into the ignition and turn the car on. Do not start the engine.

4

Look for the "erase" button on the scan tool and press it. Look on the instrument panel for the Service Engine Soon light to go out. Once it does, remove the scan tool from the port and turn off the car.

The Taurus is a mid-size family car introduced by the Ford Motor Co. in the early 1980s. Like other automobiles, the Taurus requires periodic adjustment of the wheels, often referred to as an "alignment," to ensure that the vehicle tracks straight and its tires wear evenly. Factory specifications for an alignment were the same for all Taurus models in 1988. These specifications are given for a vehicle at curb height with one-half tank of fuel.

Camber

Measured in degrees, camber is the outward or inward tilt of the wheel in relation to the center of the vehicle. The Taurus camber angle should be the same on both left and right wheels. The nominal angle should be +0.5 degrees with maximum allowable difference of 0.6 degrees.

Caster

Caster is both the rearward and the forward tilt of the steering knuckle from the true vertical. Caster is the measurement in angles that is responsible for directional stability. The Taurus caster angle should be the same on both left and right wheels. Caster angle should have a nominal measurement of +3.8 degrees with maximum allowable difference of 1.0 degree.

Toe

Toe is the difference between the leading and trailing inside edges of the front wheels. The total toe specification is -0.100 inches and an angle of -0.2 degrees.