Hello. I have a deere 750k that is derating … throwing codes ECU 1569.31. - “engine derate active” also code ECU 157.1 -“ fuel pressure low” does anyone have a idea what look for to resolve this? I’ve been trying and waiting for a Deere technician to come out to job site for a week now.. I’m losing patience! Fuel Filters were changed not long ago..fwiw Thanks in advance!
machine serial number? Did you loosen the fuel cap to see if the issue goes away? Restricted supply from the fuel tank could create that codes as well.
Thanks the advice! I think we’ve got it figured out… as I went through all and eliminated pretty much everything that was mentioned .. i ended up changing out a small fitting “about the size of my pinky finger “ on the fuel rail that controls the rail pressure… so far so good