What does it mean?
B1375 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Driver's Door Power Tailgate Switch Circuit Malfunction .
Symptoms
- The power tailgate does not respond to the driver door switch, although the key fob and the tailgate handle still work
- If the switch is stuck closed the tailgate may try to operate on its own or refuse all power operation
- A message or chime about the power tailgate on vehicles fitted with a message centre
- The backlight in the switch may be dead at the same time
- The tailgate can still be opened and closed by hand
Likely causes
- Worn or stuck power tailgate switch in the driver door trim, holding a permanent request
- Broken conductor inside the rubber boot where the door harness crosses the driver door hinge
- Water in the driver door switch pack or door module after the vapour barrier was disturbed
- Corroded connector behind the driver door trim panel
- Switch wire shorted to ground or to power after door speaker, mirror or trim work
- Loose or dirty ground for the driver door switch pack
- Input stage fault in the body control module
How to fix it
- Try each control in turn - driver door switch, key fob, outer handle, inside button - to confirm only this input is affected
- Watch the switch input state on the scan tool while pressing and releasing the switch
- Remove the driver door trim and inspect the connector for green terminals, damp and a loose ground
- Flex the harness inside the door hinge boot while watching the input; broken strands show up as the signal drops out
- Test the switch itself for continuity when pressed and a clean open when released
- Repair the broken wire in the boot or replace the switch pack as the test indicates
- Replace or reprogram the body control module only after the switch, wiring and grounds are proven good