Code Definition

B1337 — Door Ajar RR Circuit Short To Battery

System: Body  |  Type: Manufacturer-Specific  |  Make: Generic

About B1337

B1337 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1337 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1337 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Body Control Module (BCM) monitors the right rear door ajar input through a switch (often integrated into the latch) that pulls the circuit to ground when the door is open. DTC B1337 sets when the BCM detects that the right rear ajar input is being held at battery voltage when it should be transitioning between ground and an open or pulled high state, indicating an unintended short to a positive supply along the circuit. The condition is most often caused by chafed wiring contacting a constant 12V feed inside the door boot or rear quarter harness, an aftermarket alarm or remote start splic...

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