- February 8, 2021
- By Rizwan Akram
- In Blog
- 2382
- 0
Definition of P0400 EGR The basic definition of P0400 EGR code corresponds to Exhaust Gas Recirculation Flow Malfunction. (EGR valve) What the P0400 code means P0400 belongs to OBD-II generic code. It points that the engine control module (ECM) has detected some problem with the exhaust gas. Mostly it means that the engine EGR valve