Hello First Time Posting.

For a few days now our forklift has been throwing the check engine light. It isn't always on when you start it but for about 3 days now it has been coming on and off after you start it. Once on it stays on until you shut it down.
It has a low idle and the hydros aren't always as responsive as normal.

I saw the diagnostic port, is there a scan tool anywhere I can buy to chase the problem myself. If so please leave a link.