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AutoMD ... 12/11/2013

2003 Buick LeSabre Limited 6 Cyl 3.80L

Engine

Why does diagnostic say Cylinder 1 is running lean

Check engine light is on

1 Answer


HouseCallAuto

HouseCallAuto 12/11/2013

It does not say cyl 1 is lean. It says Bank one is lean, or code P0171 which can have multiple causes. Not a sure thing but I'd say replace the mass air flow sensor. Probability here is greater than 75%.

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