I have a 2002 1500 4X4 with a 5.9 gas motor. I love the truck. the engine light has been on since I got it about a year ago. Its the p0 601 .means the computer is broke and needs to be replaced from what Ive read so far but then there are no symptoms other then the engine light is on . that is strange!! can any body explain this to me. we dont have inspections in florida so that don't make any diference here but I have a problem now with it but dont think it has anything to do with that .
I picked up a car 5 hrs away with my trailer. its just a open trailer and the truck handles it no prob .but when I got off the turnpike almost back home , it acted like slugish .like there was not enough fuel .I unloaded the car at my shop and checked the codes .that was the only one. unhooked the trailer and still was very bad. this morning it is fine ,no prob all day. I am gonna check the fuel pressure tommorow but still unsure.
but whats up with that code if you need to change the ecu just to turn off the light. the computer must work fine if it runs good ? I dont get it?