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Cadillac
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2002
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Eldorado ETC
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System - Self-Diagnostics - 4.6L
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Diagnostic Tests
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DTC P0401: EGR System - Insufficient Flow
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Conditions for Setting DTC
Conditions for Setting DTC
The MAP changes monitored during the EGR flow test indicate insufficient EGR flow.