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2002 Buick LeSabre Custom 3.8L MIL Lamp on
Posted to GM Driveability on 9/11/2007 20 Replies

Car came in with severe lack of power and codes p0171 lean, and p0131 O2 sensor voltage low. Found severe dirt on MAF wire and very dirty air filter. Changed air and fuel filters and cleaned MAF wire. Car now has plenty of power, so I clear codes and let it go...

FIX posted 9/14/2007

20 Replies Received (View Replies)

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car Vehicle Data

2002 Buick LeSabre Custom

VIN 1G4HP54KX2
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / multi port injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage
P0171Fuel System Too Lean (Bank 1)