OBD-II fault code

B00B2: Driver Seat Occupant Classification Sensor "C" (Subfault)

What it means

The restraint control module monitors driver seat occupant classification sensor C as part of the seat classification system. It sets this code when it detects a fault in that sensor or its circuit; the title does not specify the failure mode.

At a glance

  • Usually lights the airbag (SRS) or body-system warning light

How it works

Driver seat occupant classification sensor C is one of the sensing elements used to assess the driver seat for restraint-system decisions. B00B2 points to a fault involving sensor C or its circuit specifically; it does not identify the failure mode or implicate sensors A, B, D, or E.

Common causes

Most likely first.

  1. Faulty driver seat occupant classification sensor C
  2. Damaged wiring or connector beneath the seat
  3. Sensor readings affected by seat or upholstery damage
  4. Fault in the restraint control module

Symptoms

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

How to diagnose it

  1. Read restraint-module codes and available seat-sensor data with a scan tool that supports the vehicle's restraint system.
  2. Check whether B00B2 is current and whether other driver-seat sensor codes suggest a shared connector, wiring, or module problem.
  3. Inspect the driver-seat cushion and upholstery around sensor C's sensing area for damage or interference.
  4. With the restraint system safely disabled as instructed by the manufacturer, inspect sensor C's connector and wiring beneath the seat.
  5. Test sensor C and its circuit using the manufacturer's diagnostics, and compare its reported data with the other seat sensors if available.
  6. If sensor C and its wiring test correctly, investigate the restraint control module and its connections.

Common fixes

  • Remove or correct seat-cover interference affecting sensor C.
  • Reconnect and secure a loose sensor C connector.
  • Repair damaged wiring or terminals in the sensor C circuit.
  • Replace driver seat occupant classification sensor C when testing confirms failure.
  • Repair or replace the restraint control module if vehicle-specific testing confirms an internal fault.

Can I keep driving?

A fault in driver-seat classification can affect restraint decisions in a collision. Arrange prompt diagnosis and do not assume the airbag system will respond normally.

A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together

This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.