P0401 OBDII CODE: Insufficient EGR Flow
P0401 is a very common OBDII trouble code. It has to do with the emissions system and stands for: P0401: EGR → Insufficient Flow The EGR system on a vehicle is responsible for re-circulating exhaust gasses in order to lower the vehicles emissions output. There are three main parts to the EGR system. They are the … Read more