F350 7.3L, P0221 Throttle Switch B Circuit Performance

FORD F-350
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IBM3554
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What part or parts do I need to replace or check for this problem. The truck has 160K miles on it. It would not throttle right and it would seem to shut down while driving.
Apr 8, 2007 at 10:36 AM
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MERLIN2021
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My guess would be the thottle position sensor...
Apr 9, 2007 at 1:32 PM