Code Definition

B0768 — Service warning lamp Circuit High

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

About B0768

B0768 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 B0768 is stored, the module has detected a signal or supply voltage higher than the expected operating range.

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 B0768 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

DTC B0768 is a generic body code that indicates the body control module or other monitoring module has detected a higher-than-expected voltage on the service warning lamp output circuit. The service warning lamp (typically the 'Service' or 'Service Vehicle Soon' indicator on the cluster) is normally driven by a low-side driver inside the BCM or controlling module — when commanded on, the driver pulls the circuit to ground, completing the path through the bulb or LED to switched ignition power. The module monitors the voltage on the driver pin and expects it to pull low when the lamp is comma...

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