Code Definition

B2243 — Driver Rear Door Ajar Circuit Open

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B2243

B2243 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B2243 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.

Because B2243 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Body Control Module (BCM) monitors the driver rear door ajar switch circuit to determine whether the door is open or closed. DTC B2243 sets when the BCM detects an open circuit condition on the driver rear door ajar switch input, meaning the expected voltage state cannot be read. The ajar switch is typically integrated into the door latch assembly and reports back to the BCM via a dedicated signal wire, allowing the BCM to control interior lighting, chimes, and door open warnings. When this code is set, the driver may notice the door ajar warning behaving erratically, interior lights faili...

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