OBD2 Code P0171 System too lean bank 1 intermittent snag

GCoC

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2012 Mazda 3 GT 2.5L
Good day,

On my 2012 Mazda 3 GT 2.5L I have an intermittent check engine light coming on that read as "P0171 System to lean bank 1"

I was hoping to be directed to some resources or told some information on what could be causing this, what's some troubleshooting I could be doing, etc.

I haven't done any maintenance at all on the car besides changing my oil and topping up coolant so far. I've owned it for 4 months / 8,000 KMs and it's sitting at 58,000 KMs.

It was in a fender bender prior to purchase and the hood, front bumper, and both headlights were replaced, no structural damage.

Thanks!
 
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