geroj this right
you must connect psi display
and delete the fault
psi with the display you can monitor all engine sensors
but you will need to connect the interface connector in diagnostics
the ecu
if you need anything you can contact me
by my email or skype

bsayre(at)saycoequipment(dot)com

You PSI software?
I Deleting via PSI.
Just disconnect the battery.
Order number of sensor is different.
Give your mail in profile.

We replaced the foot position pedal sensor and it sloved 95% of the problem (no more limp mode or stumbling). Customer says once in a while it acts up? Not sure what "acts up" mean but they said its been like that since day one. Was thinking about replacing the throttle sensor? Is the throttle sensor the same parts as the FPP?
I also read another post of your on retrieving and clearing error codes. It was also right on. Great job! Would like to get your email.

DTC 612 - FPP LOW VOLTAGE
Circuit Description
The foot pedal position (FPP) sensor uses a variable
resistor to determine signal voltage based on pedal
position. Less depression of pedal results in lower
voltage, and greater depression results in higher
voltage.
This fault will set if voltage is less than 0.2 volts for
greater than 0.30 seconds with engine cranking or
running. Forced idle and low rev limit will be enforced
during this fault. When these are enforced,
maximum engine speed is 1500 rpm. The low rev
limit is enforced for the remainder of the key ON
cylce.
Conditions for Setting the DTC
Foot pedal position.
Check condition - engine cranking or cranking.
Fault condition - FPP sensor voltage less than 0.2.
MIL - on during active fault.
Adaptive - enabled.
Forced idle enforced.
Low rev limit enforced.