Code Definition

B2605 — Disable Signal Open Circuit

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

About B2605

B2605 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 B2605 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 B2605 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

A disable signal is an input a control module monitors to inhibit a function under defined conditions, and it is widely used in power accessory systems such as power doors and liftgates to block operation when, for example, the vehicle is in motion, a child lock is active, or another module commands a lockout. The module watches this circuit for a valid state. DTC B2605 is set when the module detects an open circuit on the disable signal input, meaning the expected reference, ground, or continuity on that wire is missing. With the disable input reading open, the module cannot confirm the inten...

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