Code Definition

B2446 — RESCU/VEMS Input Circuit Open

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

About B2446

B2446 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 B2446 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 B2446 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 B2446 code indicates the Body Control Module (BCM) has detected an open circuit on the RESCU or VEMS input. RESCU (Remote Emergency Satellite Cellular Unit) and VEMS (Vehicle Emergency Messaging System) are factory emergency communication systems found on certain Ford and Lincoln vehicles that allow the driver to request emergency assistance through a button mounted in the overhead console or instrument panel. The BCM monitors the button signal wire continuously and expects to see a normally pulled up reference voltage that is briefly grounded when the button is pressed. This code sets whe...

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