Hi,

- Ask your 3rd party come to the window 3 & 32 to delete all the history error codes and try to run the truck again until it appears the problem then come back to Window 3 to check ?
- If no any codes, this means you have no serious problem. Please come to check carefully all the traction enable e.g. Seat switch, direction switch, pedal switch, cabin SW....one of them is losen and not stable,...I used to have the same problem before and found that it was caused by direction switch (option) lost GND even this truck has 2 pedal and doesn't use this switch but I had to reconnect this => you must check it. Do not think about the big problem just focusing to the operating condition.
Good luck & keep in touch
Regards