Aveo 0131 code

[patricklprice]

Hi! Ive tried thoroughly to research this but cant find the soluttion so Im asking here. I have 2005 chev aveo ls with 149,000 miles. The car runs great and gets good gas mileage but I have a nusuance P0131 code that pops up all the time. I replaced both 0-2 sensors and made sure I had no vacuum leaks or intake / exhaust leaks. I can drive the car for 200 miles on the interstate and the eng light will never come on but if I romp on the gas pedal the eng light will come on every time with the 0131 code meaning bank 1 too lean. I use premium shell gas and stp fuel injector every tank. Ive went through 3 tanks so far thinking the code would clear its self but it doesnt so I use the scanner to reset it. Obviously theres no leaks or connection probs or the code would come up within 20 min of driving it. The catalytic coverter is clean and the new 0-2 sensors are bosh.
Any suggestions? Thanks Patrick

[Daniel]

Hi,

Can you check and compare condition and color of spark plugs electrodes?
Check fuel pressure 41~47psi.
Lazy injector?
Fuel filter ok?
Try to read the freeze frame to look at stored operating conditions at the time the diagnostic fails.