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1998 Buick Century Custom 3.1L Poor Fuel Economy, MIL Lamp on
Posted to GM Driveability on 11/16/2011 34 Replies

hello gang!!!! i have a 98 buick cetury,3.1 engine, has code p0172 (rich) and code p0446 (evap vent problem) it gets bad fuel milage, i have seen on here that a bad ftp sensor can cause p0446 (it already has a new vent selonid) ftp pid is at 4.3 volts koeo, fu...

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  Related Documents & Media  1998 Buick Century Custom

 
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car Vehicle Data

1998 Buick Century Custom

VIN [No VIN Available]
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Fuel Economy, MIL Lamp On
OccursAlways

Trouble Codes

P0172Fuel System Too Rich (Bank 1)
P0446EVAP Vent Control System Performance
Message Closed

car Vehicle Data

1998 Buick Century Custom

VIN [No VIN Available]
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Fuel Economy, MIL Lamp On
OccursAlways

Trouble Codes

P0172Fuel System Too Rich (Bank 1)
P0446EVAP Vent Control System Performance