Code Definition

B1392 — Power Door Memory Lock Relay Circuit Failure

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

About B1392

B1392 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 B1392 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.

B1392 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) or Door Control Module (DCM) controls the power door memory lock relay to operate the door lock motors as part of the vehicle's keyless entry, speed sensitive auto lock, or driver memory recall functions. The relay is a switched output that energises a coil on command from the module to drive the lock actuators. DTC B1392 sets when the module sees an open circuit, short to ground, short to power, or out of range feedback at the relay control or load terminal during a lock or unlock event. Symptoms typically include power door locks failing to operate from the key ...

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