OBD Guide

B1515

Seat Driver Occupied Switch Circuit Failure

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • Incorrect operation of the passive safety system
  • Error B1515 in diagnostic scanner memory

Causes

  • Open or short circuit in wiring harness
  • Faulty seat occupancy sensor
  • Poor contact in connectors
  • Contact corrosion
  • Mechanical damage to wiring

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect the sensor connectors for corrosion or damage.
  3. Check sensor resistance
  4. Replace sensor if necessary
  5. Clean connector contacts
  6. Reset the error and check the system

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