Mike's Workshop Manuals
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Chevrolet
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1989
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Hi-Cube 6.2 J, 400/M40
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Repair and Diagnosis
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Engine Performance
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System
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6.2L CEC Testing
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Diagnosis & Testing
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Code 23 - Throttle Position Sensor MISADJUSTED
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Diagnostic Aids
Diagnostic Aids
Disregard Code 23 if "SERVICE ENGINE SOON" light goes out as soon as throttle is returned to idle.