Diesel Data
: Automotive Repair
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1983
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S10/T10 P/U 4WD L4-119 1.9L VIN A 2-BBL
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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Manufacturer Code Charts
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DTC 21
DTC 21
Code 21 - Idle Or WOT Switch Circuit Open Or Shorted:
