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Home >> Chevrolet >> 2003 >> Chevy Express G2500, Van Passenger Extended >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self Diagnostics - 4.8L, 5.3L & 6.0L Gasoline >> Diagnostic Tests >> DTC P0401: EGR Flow Error >> Conditions For Setting DTC

Conditions For Setting DTC

The MAP changes monitored by the PCM during the EGR flow test indicate an insufficient amount of EGR flow.

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