[Warning Light] codes

[miriam]

Hello! I did a diagnosis test and the following codes were...
P0100 Mass or volume air flow circuit malfunction
P0489 Exhaust gas recirculationcontrol circuit low
P1462 unknown error
P0405 Exhaust gas recirculation sensor A low
P1351 unknown error


Any help from where to begin because I'm......

10x in advance

[3rensho]

P1351 IDM input circuit Malfunction/Ignition coil control circuit High voltage
SID 803 - Pre/Post heating relay circuit. Relay not controlled and glow plugs supplied

P1462 A/C pressure sensor circuit Voltage High

Got these codes from here.

[j90xxx]

Sounds like EGR problem?

[miriam]

Sounds like EGR problem?

thanks a lot!