Code Definition

B2599 — Tailgate Release Open Circuit

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

About B2599

B2599 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 B2599 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 B2599 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) controls the power tailgate release by commanding an electric solenoid or actuator that retracts the latch pawl so the tailgate can open. DTC B2599 is set when the BCM detects an open circuit in the tailgate release control circuit, meaning no current flows through the release actuator when the function is commanded. The BCM monitors the load on this output, so a broken wire, a failed solenoid winding, or a disconnected connector all present as an open circuit. When this code is active the power release will typically not respond to the key fob, the interior switc...

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