Should the EPC, Stability Control, and Check Engine warning lights illuminate your dash, the cause could be either a dirty mass air flow (MAF) sensor, which just needs cleaning, or a bad MAF sensor which needs to be replaced. Using an OBD2 scanner, codes P0102 & P0172 are indicative of a bad mass air flow (MAF) sensor. Attempts to clean the MAF sensor and replace it are described here.


Mass air flow sensor