1996 Buick Park Avenue - P0171 Code

Asked by Jul 20, 2017 at 06:26 PM about the 1996 Buick Park Avenue 4 Dr STD Sedan

Question type: Maintenance & Repair

Hi all,

Got a Buick Park Avenue with the 3.8l V6 Engine.  It suddenly starting not
wanting to stay running when starting cold.  Code came back for O2 Sensor
Bank 1 and System Too Lean Bank 1.  Replaced the front O2 Sensor and
cleaned the MAF.  Not popping the code now but still having the problem
when cold starting that it will run and then sputter and die, even with your
foot on the gas revving it up to 3000 RPM.  After doing this 10-12 times, it
seems the engine warms up just enough and suddenly it runs fine.

Could really use some advice here.

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