B00B7: Driver Seat Occupant Position Sensor "A" (Subfault)

What it means

Fault on driver seat occupant position sensor A — detects occupant proximity to airbag (typically capacitive or ultrasonic).

At a glance

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

How it works

Driver seat occupant position sensor A is one input the restraint control module uses to assess the driver's position relative to the airbag. The module sets B00B7 when it detects a fault specific to sensor A or its circuit; the code does not identify a particular electrical failure.

Common causes

Most likely first.

1. Faulty driver seat occupant position sensor A
2. Damaged wiring or connector at the sensor
3. Obstruction or damage affecting sensor readings
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 the restraint-module codes and freeze-frame data, noting whether B00B7 returns and what seat or occupant-position data the scan tool reports for sensor A.
2. With the ignition off, check around the driver seat for objects, damage, or seat-cover changes that could obstruct or affect sensor A.
3. Inspect sensor A's accessible wiring and connectors for looseness, pin damage, chafing, or signs of liquid intrusion, taking care around airbag wiring.
4. Use the scan tool's restraint-system data to compare sensor A's reported position or status with the other available occupant-position inputs while the seat is moved as permitted by the manufacturer's procedure.
5. If the wiring and surroundings are intact, test sensor A's circuit and sensor against the manufacturer's specification, then assess the restraint control module only if those checks pass.

Common fixes

• Remove an obstruction affecting driver seat sensor A.
• Repair damaged wiring or secure or replace a faulty connector at sensor A.
• Replace driver seat occupant position sensor A if it fails the specified test.
• Repair or replace the restraint control module only after confirming sensor A and its circuit are sound.

Can I keep driving?

Treat the airbag or restraint warning as a possible loss of a safety function and arrange diagnosis promptly; avoid relying on the system to respond as designed in a crash. Do not probe restraint wiring casually, since improper handling can trigger deployment.