Hi Check engine lights on and has code p171 lean

Are you getting hesitation when the car first starts up of you don't warm it up before taking off? If so, you might have the same problem I had.
I Fixed it with a $6 can of Mass Airflow Cleaner from AutoZone.
You will need to locate and remove the Mass Airflow sensor from the air duct that sits between the Intake Manifold and the Air cleaner. It will require a security torx wrench. Remove the sensor and spray it liberally with the MAF cleaner. Do not use use anything else to scrape or rub any part of the sensor probes.
Replace the sensor and then reset the code. Run it for a week or so for the emission system to run through its diagnostic cycle and with any luck the light will stay off.

Check for a vacume leak. You can do this by spraying brake cleaner around the intake and throttle body. If you don't find anything there. Check to see if your map sensor is reading properly. To do this you are going to need a scanner