2000 Freightliner FL60 Check engine light

I'm considering buying this truck to use in my business - everything seems to be good except the check engine light. It sounds good, runs well.... My stepson (diesel mechanic in training/school, still) has looked it over and can't seem to find anything. He bought the diagnostic tool and we'll try that tomorrow.

Anybody have some thoughts as to what we might check? It's not tagged right now so we're trying to avoid any issue when taking it through inspection otherwise, we'd roll it to the shop.

Also, my brother lives in NC - he says they wouldn't fail for CE. I'm not sure about that here in Delaware.

Thanks so much.

 

Thank you so much - we'll try that.

 

Thank you all for the information. Sorry for not posting more about the engine and transmission. I don't have it here but will get it and post later. I remember that it's a 2006 Freightliner FL60 with a Mercedes engine.

We couldn't find any "black button" but using some information I found here (thanks to whoever that was about using the cruise control settings) we did get codes ECU128 and ABS136. So at least we have a little more info than we did.

MRMTRANS - we do have emissions testing in Delaware but so far, what I've read and from what we have been told, that they don't check this at this weight (MGVWR 25,500). We're going to try running it through inspection and see how that goes.

D.

 

Thanks anyway for the help. It just pointed us in a direction to keep looking.

I posted that early this morning and meant to put that it has a 6-speed manual transmission.