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2001 Buick Century Limited 3.1L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Misfire
Posted to GM Driveability on 12/11/2012 21 Replies

this car idles bad and when you try to accelerate it back fires pops and falls flat, the cat converter was completly melted down. i checked data with snap on scanner all seemed ok except st and lt were in neg at idle maf was at 13 grms per sec which i thought ...

21 Replies Received (View Replies)

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car Vehicle Data

2001 Buick Century Limited

VIN 2G4WY55J51
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Hesitation, Cuts Out, Misfire
OccursAlways

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
P1374CKP Sensor High To Low Resolution Frequency Correlation
Message Closed

car Vehicle Data

2001 Buick Century Limited

VIN 2G4WY55J51
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Hesitation, Cuts Out, Misfire
OccursAlways

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
P1374CKP Sensor High To Low Resolution Frequency Correlation