(Initial PM to Lpgc, who suggested I repost here)
2006 L322 4.2 SC
This is a bit of a hail mary at this point. I have been troubleshooting (because I have no formal training, just the manual and SDD v165)the 2 lean codes 171/174 (only those) for about 2 months now. I have tried many things. Yesterday I stumbled on your replies to a gentleman with a nearly identical issue about 2 years ago. Would you be willing to give me some clues? If yes, what info do you need? Still newish to SDD and have trouble getting files out of it for others to view.

Thanks,

Josh