Some of the parameters for speed / acceleration MAY be unlocked depending on how the truck was configured in the past, the pin code parameter wont be - it need the BT can key / Truck Com

There are 2 different ways to change the pin codes on the LPE but it depends on what software package the truck is running.

Truck OFF, press & hold a horn button, turn truck ON & watch the display - when you see Pn shown let go of the horn button & write down the numbers that show up **** followed by **** then the version -****
Package number is 6 digits long & the version number is 3 more digits on the end.

Post back what software your truck has.

1st thing we do when a truck is delivered is make sure the operator is locked out of changing any settings apart from the time on the clock if fitted.