Need help for Isuzu Forward 6HL1 Flash Code

[bidong]

Hi guys,

I'm currently troubleshooting a Isuzu 6HL1 Forward truck with a common rail diesel system. The OBD-2 socket can't be found so we had to do the flash code diagnostic.

Can someone help me with the flash codes I retrieved?

21
24
38
57


Also, if anyone has the manual for this. It will be highly appreciated. =)

Thanks in advance,

bidong