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B0228

Front Fog Lamp Circuit

The body control module has detected a fault in the front fog lamp circuit — typically an open bulb, blown fuse, or wiring fault. One or both fog lamps may not work.

  • Check engine light: Not always
  • Emissions related: No
  • Repair difficulty: easy

Symptoms

  • Warning light or symbol related to the affected system
  • Comfort or safety function impaired

Common causes

Ordered by how often each turns out to be the cause.

  • Fog lamp bulb blownCommon
  • Fog lamp fuse blownPossible
  • Wiring or connector faultLess likely

Parts involved

  • Front Fog Lamp
  • Fog Lamp Relay
  • Body Control Module

B0228 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.