Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the sensor in the passenger seat that helps the car know if someone is sitting there. It's like when your computer mouse isn't working right.
The OBD-II code B00C4 indicates an issue with the occupant classification sensor in the passenger seat, which is responsible for detecting the presence and weight of a passenger.
The occupant classification sensor is part of the airbag system and is used to determine if the passenger airbag should be deployed in the event of a collision. A fault in this sensor can lead to improper airbag deployment, either failing to deploy when needed or deploying when not needed.
• Airbag warning light illuminated
• Passenger airbag may not function correctly
• Error message on the dashboard
• Faulty occupant classification sensor
• Damaged wiring or connectors
• Faulty control module
OBD-II: On-Board Diagnostics, a standardized system for vehicle self-diagnostics.
Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it.
• Check for any visible damage to the passenger seat sensor and wiring.
• Use a diagnostic scanner to read and clear the code.
• Test the sensor and wiring for continuity and proper operation.
• Replace the faulty occupant classification sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Camry
• Honda Accord
• Ford Fusion
• Regularly inspect seat sensors and wiring.
• Avoid placing heavy objects on the passenger seat.
• Ensure proper seat installation and adjustments.
Sensor Issue
• Do not ignore the airbag warning light.
• Have the vehicle inspected by a professional.
• Avoid using the passenger seat until repaired.
Check with the vehicle manufacturer for warranty coverage on airbag components.
This code has been associated with various models over the years, often due to wear and tear or accidental damage to the seat sensor.
High – Airbag system issues can affect safety during a collision.
Driving with a malfunctioning airbag system can be dangerous and may not comply with vehicle safety regulations.
• Vehicle parked and engine off
• Access to passenger seat area
The occupant classification sensor is located within the passenger seat cushion.
Q: Can I drive with the B00C4 code?
A: It's not recommended as the airbag system may not function properly, posing a safety risk.
Q: How do I reset the airbag warning light?
A: After repairs, use an OBD-II scanner to clear the code and reset the light.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Body and airbag faults often need a scanner that can access more than generic powertrain codes.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking power, ground, and continuity in body-system circuits.
View on Amazon
Universal · Fuse kit
Useful for electrical diagnosis when blown fuses or circuit faults are part of the troubleshooting process.
Useful when body electrical faults trace back to blown fuses or shared circuits.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.