Code Definition

B1364 — Ignition Start Circuit Open

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

About B1364

B1364 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 B1364 is stored, the module has detected an open (broken or disconnected) electrical path 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.

B1364 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

DTC B1364 indicates that the Body Control Module (BCM) has detected an open circuit on its ignition start input, meaning that when the key is moved to the START position the expected battery voltage on the start signal wire never arrives. The BCM relies on this signal to authorise the starter relay or to gateway a crank request to the engine module, so an open circuit here typically presents as a complete no crank with the dash and accessories powering up normally in RUN. Common physical causes include burnt out start contacts inside the ignition switch electrical block, a broken conductor in ...

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