Code Definition

B0951 — Instrument dimming Circuit malfunction

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

About B0951

B0951 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 B0951 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 B0951 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 instrument panel dimming circuit controls the brightness of the dashboard illumination, gauge lighting, and often the interior switch panel lights based on driver input from the dimmer switch (or rheostat) and, on equipped vehicles, feedback from the automatic headlamp / ambient light sensor. The Body Control Module (BCM) or instrument cluster interprets the dimmer input — typically a variable voltage or PWM signal — and sets the backlight output accordingly. DTC B0951 is set when the control module detects an electrical fault in the dimming circuit, such as an open, short to ground, s...

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