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Chevrolet
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2002
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Chevy Express G2500, Van Cargo Extended, 5.0 M
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls Self-Diagnostics - 5.0L & 5,7L
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Diagnostic Tests
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DTC P0121: TP Sensor Performance
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Conditions For Setting DTC
Conditions For Setting DTC
Stuck High Test
The TP is more than the calculated throttle position for more than 5 seconds.
Stuck Low Test
The TP is less than the calculated throttle position for more than 5 seconds.