C0401: 'EDC. System diagnosis, calibration of injectors and engine adjustment'
C0403: 'Common - Rail. Diagnosis and checking of fuel systems'
C0404: 'Turbocompressors. Efficiency tests and calibrations'
C0405: 'Fans. Efficiency tests and configuration'
C0406: 'Euro 6. Diagnosis of exhaust gases after-treatment systems'