Code Definition

B1319 — Driver Door Ajar Circuit Failure

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

About B1319

B1319 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 B1319 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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.

B1319 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) sets DTC B1319 when it detects an electrical fault in the driver door ajar switch circuit. The driver door ajar switch is typically a plunger style switch built into the door latch assembly, or a hall effect sensor on more recent vehicles, that signals the BCM whenever the door is open. The BCM uses this input to control interior lighting, the door ajar warning chime and indicator, courtesy lamp delay, central locking strategy, and the security system arm and disarm logic. When the circuit reads as continuously open, continuously closed, or rapidly toggling beyond...

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