Komatsu FG25T-14:
Fuel Pressure Sensor

Hi All,

I'm working on a FGT25T-14 (589108A) and after about ten minutes of running the truck will not allow any throttle action, I believe its in the fuel pressure sensor. I'm curious if the screw in fuel pressure sensor is a common failure point on these trucks and if anyone has any advice on this condition.

Thanks in advance!
  • Posted 11 May 2023 05:56
  • Discussion started by Mechanicsville8
  • Virginia, United States
Showing items 16 - 20 of 20 results.
That is a problem you have to try to repair dash first see if any plugs are not secure into dash also l believe there is a board underlay in the dash see if that is bad l believe key switch ignition controls the positive side of the light bulbs in the dash the check engine light l believe is controlled by the computer for ground. Check all fuses and wiring going to the bottom of dash if you do not address the dash problem you can not find this problem.
  • Posted 14 May 2023 09:04
  • Reply by Scott_
  • Pennsylvania, United States
Scott
Yes sir, Non of the dash lights work, no illumination ever.
  • Posted 14 May 2023 08:30
  • Reply by Mechanicsville8
  • Virginia, United States
Ok are you trying to tell me that when you turn the key on the lights on the dash like like oil pressure and charging light and check engine light does not turn on and go out after the truck starts. Or are you telling me there is no check engine light that is on when the truck goes into limp mode
  • Posted 13 May 2023 09:20
  • Reply by Scott_
  • Pennsylvania, United States
Scott
Ok I appreciate it, do you have any advice becasue non of the dash board lights up. This thing derates after about ten minutes of running. Shut it off and it will run smooth again sometimes instantly and some times after you let it cool down a little.
  • Posted 13 May 2023 05:41
  • Reply by Mechanicsville8
  • Virginia, United States
It is not a common problem for that part to go bad first if the check engine light is on you will have to scan it to see what code is in it and if not you will have to do the petal dance and count the blinks to see what code is causing truck to be in limp mode if you need to know what to do get back to me.you can not guess as to what is causing this.
  • Posted 11 May 2023 11:57
  • Reply by Scott_
  • Pennsylvania, United States
Scott

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