Mechanics

CHEVY CHECK ENGINE LIGHT

2000 Chevrolet Malibu

I have a 2000 Chevy Malibu with a 3.1L V6 with 139, 8xx miles on it. The check engine light stays on while the car is idling but flashes when the car is moving at about 35 mph. I went to autozone to get the OBDII code read, and I got the P0171 code (fuel system for bank 1 was too lean). It shows multiple causes (O2 sensor defective, mass air flow sensor, or fuel injector problem). How do I know which problem to fix or which O2 sensor to replace? I'm in the military and can't afford to replace every part until I find the right problem. Thank you in advance for your services.
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Antball5485
October 28, 2007.



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Miss fire will cause check engine light to flash
So if it don’t need a tune up check for a vacuum leaks

BMRFIXIT
Dec 6, 2007.