Hello everyone. I am going crazy trying to figure out the D-75 code on my Cat 2018 DP55N1 forklift. The error refers to Idler SW Error, however, it does not explains what to do to troubleshoot it. Dealers and all have tried different things and nothing works. The systems, well forklift drives fine, then out of no where the accelerator pedal does not work, but machine can keep going forward or backwards if you change gears, just on idle. When the D-75 code appears it does the above, and for not a certain reason. I so far tested volts and 5.01 is getting to the TPS. But from there on the TOS lever moves but with no response. If i turn machine off and back on, then the accelerator works and the code despair. While driving it again at no specific time, same thing happens. Does anyone knows if this could be a bad TPS?