Code Definition

B2239 — Rear Cargo Door Set Switch Stuck (Short to Ground)

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

About B2239

B2239 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 B2239 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) 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 B2239 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

DTC B2239 is set by the Body Control Module or the rear cargo door control module when it detects that the rear cargo door set switch input is continuously shorted to ground, indicating a stuck or constantly pressed condition. The set switch is typically a momentary push button used by the driver to program or recall the rear cargo door's preferred open height on vehicles with a power tailgate that supports memory positions, and the module monitors the switch state expecting it to be active only briefly when pressed. When the switch input remains active (shorted to ground) for longer than the ...

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