Code Definition

B0283 — Electric rear demister Circuit malfunction

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

About B0283

B0283 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 B0283 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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 B0283 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 HVAC or body control module operates the rear window demister by switching a relay (or solid-state high-current driver) that supplies battery voltage to the heated grid printed onto the rear glass. Most systems monitor either the relay control circuit, the high-current feed to the grid, or the current/voltage drop across the grid to confirm the load is connected and within range. DTC B0283 is set when the module detects an electrical malfunction on this circuit — typically an open-circuit grid, an open or shorted relay coil, a blown high-current fuse, or a feed wire that is not pulling l...

Join TaT to view the complete code information and diagnostic details.

Quick Facts