What does it mean?
B1336 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Door Ajar RR Circuit Open .
Symptoms
- The right rear door never registers as open and its interior lamp does not light
- Door ajar warning is not displayed for that door
- The alarm arms with the rear door open, leaving the vehicle unsecured
- Interior and welcome lighting behave inconsistently
- Automatic locking may operate while the door is still open
Likely causes
- Open circuit in the right rear door latch ajar switch
- Broken wire in the rear door hinge loom, worn out by repeated door opening
- Jamb connector corroded or disconnected
- Latch switch contacts worn or contaminated with grease
- Wiring damaged during rear door trim, child lock or speaker work
- Water intrusion through a torn vapour barrier corroding the latch internals
- Body control module input circuit failure
How to fix it
- Check the right rear door ajar input in live data while opening and closing the door
- Ground the signal wire at the latch connector and see whether the module registers a door open state
- Flex the hinge loom while monitoring for an intermittent signal
- Peel back the conduit boot and inspect for broken strands inside
- Check the jamb connector for corroded and pushed-back terminals
- Replace the rear door latch when its internal switch is open
- Repair the hinge harness, clear codes and confirm lamps, chimes and the alarm all respond correctly