B00B4: Driver Seat Occupant Classification Sensor "E" (Subfault)

What it means

The restraint control module monitors driver seat occupant classification sensor E 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 E supplies one of the seat readings used by the restraint system. B00B4 flags a fault linked to sensor E or its circuit specifically; it does not name a failure type or indicate a fault in sensors A through D.

Common causes

Most likely first.

1. Faulty driver seat occupant classification sensor E
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. Use a scan tool with restraint-system access to read B00B4, related codes, and available sensor E data.
2. Check whether the code returns after a restart and whether sensor E data is missing or inconsistent.
3. Inspect the driver-seat cushion and upholstery near sensor E for visible damage, alterations, or interference.
4. With the restraint system made safe according to the manufacturer's instructions, inspect sensor E's connector and wiring under the seat.
5. Test sensor E and its circuit following the manufacturer's procedure, comparing its reading with other seat sensors where supported.
6. If the sensor and circuit pass, check the restraint control module and its connectors using vehicle-specific diagnostics.

Common fixes

• Correct seat upholstery or cushion interference affecting sensor E.
• Reconnect and secure a loose sensor E connector.
• Repair damaged wiring or terminals in the sensor E circuit.
• Replace driver seat occupant classification sensor E if testing confirms a fault.
• Repair or replace the restraint control module if it is confirmed to be at fault.

Can I keep driving?

This fault can affect the restraint system's assessment of the driver seat in a collision. Arrange prompt diagnosis and assume airbag operation may be affected until the problem is resolved.