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B0085

Passenger Belt Buckle Switch Circuit

The SRS module has detected a fault in the passenger belt buckle switch circuit. Same fault profile as B0084 but for the passenger side.

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

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.

  • Buckle switch failedCommon
  • Wiring under seat openPossible

Parts involved

  • Seat Belt Buckle Switch
  • Srs Control Module
  • Srs Wiring

B0085 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.