Code Definition

B1564 — Door Ajar Circuit Open

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

About B1564

B1564 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 B1564 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.

B1564 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

B1564 indicates that the Body Control Module (BCM) has detected an open circuit on the door ajar input line. The door ajar switches in the door jambs normally pull the BCM input to ground when the door is open, and the BCM monitors the line continuously for plausibility. When the BCM sees a permanent open condition where the input never pulls to ground at all, or detects an open while the latch is mechanically known to be in a closed state, it sets B1564. The fault almost always points to a broken conductor inside the rubber harness boot between the body and the door, a disconnected switch, or...

Join TaT to view the complete code information and diagnostic details.

Quick Facts