Thank you for the advise BREWSKI I will perform a calibration and check the pins and connectors, the sensor have been replaced with known good ones from a second forklift on site, I did find by going into the settings that the serial number in there does not match the serial number on the data plate of the forklift, Do you know if that could be the cause of that code?
By any chance do you know any master word I can use to go into the menu and reset the password, the basic password does not work on the second forklift there. And thanks again for your help.