2000 Infiniti I30

Computer problem
2000 Infiniti I30 6 cyl Front Wheel Drive Automatic 111000 miles

The problem is I went to AAMCO to repair my SES light they changed my 2 front and 2 back O2 sensors, but the next day the light came on agian.
I found out that the code is P0171
FYI after fuelijng or just turning the engine off the light somethimes goes away for a while but then comes back on I didnt do anything yet because I really hope it will just go off, but I would like to know what to do if it wont go off soon? : (
September 22, 2009.

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