Hello,

I got a call today from my driver that the check engine light is on in my truck (2000 Freightliner w/ a Cummins engine). Can anyone tell me what could be the problem (I know with cars normally its related to a sensor), or anyway to figure out what is wrong with it on my own (how to bring up the codes), or do I need to take it to the repair shop?

Thanks in advance..

Also wanted to add truck seems to be running fine (no idle/performance problems), oil pressure and all temp gauges are within normal range.

i have a 2000 freightliner also, does yours have a shtdwn ovride button to where you can turn ignition on and press button and give you an engine code?? then cross reference the code