The sliding door drivers side is locked? how do i get it to open

Here are the codes you posted along with the possible issues that may have caused each code to be triggered. It's possible the circuit these switches share has a problem that needs to be diagnosed.

It could well be a problem with the wiring or a problem with the connections between the switches and the Multiplex Control Unit, or possibly with the Multiplex Control Unit itself.

B1129

• Driver Side Door Lock Knob Switch Signal Error
• Faulty Driver Side Door Lock Knob Switch
• Driver Side Door Lock Knob Switch harness is open or shorted
• Driver Side Door Lock Knob Switch circuit poor electrical connection
• Faulty Door Multiplex Control Unit

B2077

• Right Power Sliding Door Remote Control Switch 1 Signal Error
• Faulty Right Power Sliding Door Remote Control Switch 1
• Right Power Sliding Door Remote Control Switch 1 harness is open or shorted
• Right Power Sliding Door Remote Control Switch 1 circuit poor electrical connection
• Faulty Right Power Sliding Door Control Unit

B2078

• Right Power Sliding Door Remote Control Switch 2 Signal Error
• Faulty Right Power Sliding Door Remote Control Switch 2
• Right Power Sliding Door Remote Control Switch 2 harness is open or shorted
• Right Power Sliding Door Remote Control Switch 2 circuit poor electrical connection Faulty Right Power Sliding Door Control Unit

B2079

• Right Power Sliding Door Remote Control Switch 3 Signal Error
• Faulty Right Power Sliding Door Remote Control Switch 3
• Right Power Sliding Door Remote Control Switch 3 harness is open or shorted
• Right Power Sliding Door Remote Control Switch 3 circuit poor electrical connection
• Faulty Right Power Sliding Door Control Unit

you should clean the locking mecanism and then lubricate with WD40. If this is a van, my van has a sliding power door on the pass side and a manual slider on the drivers. alot of times the drivers locks and dont lock like it has a mind of its own but it always works with the drivers controls. and then the next time i dont think about it and it works. now it also has child proof locks on them, a little plastic lever you slide up and down as to put in a lock position so child cant open from inside and down to allow door to open from inside. double check this. it wont unlock with the key or power? you might have to take off inner door panel to manually unlock this and get it lubed

You should be able to manually unlock the door and open it,even without the power lock working.The center roller on these vans is prone to wear,causing binding and misalignment of the electrical connectors that you see when the door is open.This may cause the locks to be disabled and the door to not open with the power button.There are three rollers on each door,but many times only the center one is worn out.The installation & alignment of the rollers is critical on this vehicle,so you should consider the dealer for this repair. good luck

open the front door...
now you have to push the locking rod towards the rear so you can open the sliding door from the inside
just follow the B pillar down and use the passenger side as reference of that black rod

the child lock rod may have been extended...
open the driver side door, and with a skinny finger, push that child lock rod back in towards the rear of the sliding door
use the passenger side as reference
once you pushed it in, you can now open it from the inside handle

The linkage may have come off handle or lock may need lubing Door panel needs to come off to do this

U have a defective door ajar switch.

Sounds like something isn't right.Try to disconnect the battery for a few minutes and see if that helps.Some times the ecu gets haywired and disconnecting the battery might reset it.And if it is the original battery you might want to get it tested.