Mechanics

ERROR CODE AND HOW TO CORRECT IT.

2000 Ford Focus

Computer problem
2000 Ford Focus 4 cyl Front Wheel Drive Automatic 79000 miles

I have an error code as follows. P0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem
What is this telling me and how do I correct the problem? I am an old time mechanic and have not had much dealings with the computer code type of work.
Thanks.
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Davismotorsports
August 10, 2008.




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