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1997 Buick Century Custom 3.1L MIL Lamp on
Posted to GM Driveability on 6/25/2007 17 Replies

I have replaced EGR and cleaned intake.. after a few days car return with PO401A code.. or PO401b. there is not alot to this system but i am missing something.. I have ran a flow chart on this system and everything to the best of my knowledge is ok..but its ba...

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  Related Documents & Media  1997 Buick Century Custom

 
Message Closed

car Vehicle Data

1997 Buick Century Custom

VIN 2G4WS52M5V
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
Misc.EGR Flow

Trouble Codes

P0401EGR System Insufficient Flow Detected
Message Closed

car Vehicle Data

1997 Buick Century Custom

VIN 2G4WS52M5V
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
Misc.EGR Flow

Trouble Codes

P0401EGR System Insufficient Flow Detected