I would start by removing the Mass Air Flow sensor and clean it with an aerosol MAF sensor cleaner.
If the MAF sensor has dirt/debris on it, it doesn’t detect the actual amount of mass air entering the engine. The computer then compares this reading to the signal from the O2 sensor. If the O2 sensor detects more air in the exhaust than what the MAF sensor signal is sending to the computer, the Check Engine light comes on with this code indicating a lean fuel condition.
Tester