DTC P0400 usually occurs on engines with mileage over 60-80 thousand km regardless of the make and model of the vehicle and regardless of the engine type - diesel or gasoline. According to the OBDII protocol, Diagnostic Trouble Code (DTC) P0400 indicates a malfunction in the exhaust gas recirculation system. Let's find out how to reset the error, why the code P0400 is displayed and how to fix the problem right now.
...
