Hi,

L233, L232 (I understand you misspelled it, there's no L223 error), L237 - they all indicate the problem with additional hydraulics joystick (the further from the seat.)
Replace the joystick (Part No 7919040042 or 41).

L239 is a seat switch.
Check if it works. Check the adjustment (perhaps it is set for too heavy driver). Check the contacts.
Replece if necessary.
If it's random, the error may be caused by the driver.

Good luck