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while driving to Cali from El Paso TX, the check engine light came on. I read the trouble codes and got P1514 (throttle Actuator Control System Mass Air Flow Performance). How can I resolve this issue?

Vehicle: 2003, Chevrolet, suburban, z71, 5.3 liter

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Check to see if there are any intake leaks. 

you can try to clean the mass air flow sensor and MAP sensor with mass air flow sensor cleaner 

you can also remove the intake piping turn the key on (dont start the car) and see if the throttle plate moves. you can also spray some mass air flow sensor cleaner inside the throttle body when the plate if open

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