Hyster H155FT:
Nox sensor codes

So have a government truck here L006 and it is throwing a 3223-12 code. that is for Pre Nox sensor. all sensors have been changed out and the code keeps returning after an hour or so. i have 4 trucks all at the same location doing the same thing.

any help would be great
thanks
  • Posted 6 Jan 2024 07:15
  • Discussion started by Nwrecchian
  • Maine, United States
Showing items 1 - 3 of 3 results.
Roy,

At the connector going to the HEGO, pin 1 is battery voltage with key on. No voltage, need to check fuse 10. Next, disconnect battery and check pins 2 and 5 resistance to battery negative cable, should reads less than 1 ohm. If resistance is high or out of range, need to check harness. Connect battery and check pins 3 to battery negative, then pin 4 to battery negative, both should read about 2.5 volts. If one is a little less or a little more that is OK. Both together need to be about 4.5 volts. Again, should they not read correctly, check harness. Last, check ohm reading between pins 3 and 4, looking for 60 ohms. All checks are made where the NOX sensor connects to the harness. Good Luck
  • Posted 12 Mar 2024 02:59
  • Reply by Fishmech
  • Virginia, United States
The hard to do we do right away. The impossible just takes a little longer.
I have same model doing that. Has been going on a year now. Have no idea, as soon as I turn it off it clears and can't trouble shoot what isn't there
  • Posted 8 Mar 2024 13:17
  • Reply by Roy_Baumeister
  • British Columbia, Canada
I can see more specifically that code is for pre nox sensor heater error. Check battery > fuses > wiring. Good luck.
  • Posted 9 Jan 2024 00:46
  • Reply by James_Brand
  • United Kingdom

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