There is no cleaning a MAP, it's not like the MAF which uses a hot wire to measure airflow by how fast it's cooling off from that airflow. Dirt buildup on the hot wire changes it's cooling properties. MAP is a air pressure sensor, when it's bad there is no cleaning. And unless you have a very high end scan tool that has a test program you'll never find it if no P codes are being set.
Experience on 5.3 MAP sensor has taught me well.
As Camp said loss of MPG is the first tip off, and at $25 it's cheap enough. My 5.3 sensor was $60, more than the MAF which was $25
please i went know location of map sensor for 2018 lt 1.5 .. and can cleaning it ..??