2000 Grand Am Trouble codes

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May 29, 2008
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#1
??? I've got (Wife's car) a 2000 Grand Am, 3. 4 L, Automatic, about 140K on it. This week I came up with 2 trouble codes. . . P0171 (System too lean bank 1) and P1133 (heated O2 Sensor insufficient switching) Gas mileage sucks right now and at $4. 15/gal it hurts a bit. Anyway. . are these 2 related, and what do I have to do to resolve this. I've been turning wrenches on my own cars since 1964 (I'm old) but all this computer controlled stuff is out of my knowledge base. I'm a professional handyman for over 35 years but I fix houses, not cars for a living.
Thanks for your help!
Johnboy
 
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#2
Open and Read pdf below for code 171.
Let us know how it goes.
Crunch

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