What it means
The restraint control module monitors driver seat occupant position sensor B as part of the occupant position 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 position sensor B supplies a separate input to the restraint control module's assessment of the driver's position relative to the airbag. B00B8 means the module has detected a fault involving sensor B or its circuit, but the code title does not specify whether the issue is wiring, the sensor, or another fault mode.
Common causes
Most likely first.
- Faulty driver seat occupant position sensor B
- Damaged wiring or connector at the sensor
- Obstruction or damage affecting sensor readings
- 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
- Read restraint-module codes and freeze-frame data, then check the scan tool's reported status for driver seat sensor B and whether B00B8 is current or intermittent.
- Check the driver seat area for objects or recent seat-cover changes that could interfere with the sensor B reading.
- Inspect sensor B's wiring and connectors for looseness, abrasion, pin damage, or moisture, following restraint-system precautions.
- Watch sensor B's live data while moving the driver seat through its normal range as allowed by the manufacturer's procedure, and note dropouts or implausible changes.
- If visual checks reveal no issue, test sensor B and its circuit against the manufacturer's specification before considering a restraint control module fault.
Common fixes
- Clear an obstruction affecting driver seat sensor B.
- Repair chafed wiring or a loose or damaged sensor B connector.
- Replace driver seat occupant position sensor B if its output fails the specified test.
- Repair or replace the restraint control module only after sensor B and its wiring test correctly.
Can I keep driving?
A restraint-system warning may mean occupant-position information is unavailable, so have the fault diagnosed promptly and do not assume the airbag will respond as intended in a crash. Avoid disturbing wiring under the seat.
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.