If you have diesel car with 5-cylinder engine from 2012 or newer, or you have 4-cylinder VEA engine, then you need to clean the boost pressure sensor every 30-80.000-km. Otherwise your engine power will rapidly decrease and you can expect the engine DTCs according the boost pressure. You need to locate this sensor under the plastic cover. If you stand front of the car, you will have it in right bottom corner under the cover (same place for VEA and old 5-cyl. engine) Unscrew the TX27 or TX30 screw and remove the sensor. The engine must be off and ignition key removed from…