I do not know my problem my engine light came on and i went to advance auto to get it looked at. the code p0171 came on the machine. how can i get this problem fixed?

https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn
All codes are OBD II. You can google them fro your answer.

https://www.fixdapp.com/blog/p0171

Banks 1 and 2 are lean. Could be mass air sensor. Fuel filter dirty injectors . Vacume leak. Or computer needs updated

sounds like the guy at the dealer ship hit the wires to the o2 sensor changing the oil fiter

code P0441 IS Evaporative Emission Control System Incorrect Purge Flow

code P0171 IS P0171 System too Lean (Bank 1

P0171 System too lean bank 1
P0174 System too lean bank 2

Last time you changed your fuel filter?
Look for any vacuum leaks.

get the engine computer scanned, for free, at any pep boys, advance auto, or auto zone-many others will do it for free as well, just have to ask-then get the actual code (i.e. 'P0171) and come back on here for help.

Stop by your local Advance Auto or O'Reilly Auto parts store. They will lend (Advance Auto) or rent you a Scan Tool to see what error codes have been set in the cars onboard computer. This should help diagnosis what happened when the Check Engine light went. Not sure why it went on then off. They usually stay on until you clear the codes...
Good Luck +

i had the same trouble, there is a rubber boot under the cover on the top of the motor, it is coming from the egr valve, takes about 5 mins to repair and less than 5 dollars.