What does fault code B0055 mean?
The B0055 fault code, applicable to all car manufacturers, means “Second Row Right Seatbelt Sensor (Subfault)“.
Background Information: Seatbelt sensors work by using pressure sensors installed in the seat cushion to check if the driver or passenger is wearing their seatbelt.
Symptoms of the B0055 Error Code:
- The airbag light on the dashboard is illuminated.
- The passive safety system may be disabled or malfunctioning.
- An error message may appear on the onboard computer display.
- The right-side second-row seatbelt is not functioning correctly.
Main Causes of the B0055 Error Code:
- The seatbelt sensor itself is faulty.
- The wiring connecting the sensor and the control module has an open or short circuit.
- The sensor connector has poor contact or is corroded.
- The passive safety control module is faulty.
B0055 Error Codes in Different Vehicles:
Chevrolet Tahoe B0055: In the Chevrolet Tahoe, code B0055 is typically related to a faulty wiring connection to the right-side second-row seatbelt sensor. It is recommended to check the wiring under the seats for damage or breakage.
B0055 for GMC Yukon: In GMC Yukon, this error may be caused by corrosion of the seatbelt sensor connector. Cleaning and treating the connector with specialized tools may resolve the issue.
B0055 in Cadillac Escalade: The cause of error B0055 in Cadillac Escalade may be a malfunction of the seatbelt sensor itself. Replacing the sensor usually resolves the problem.
Chevrolet Suburban B0055: In the Chevrolet Suburban, error B0055 may be caused by a broken wire in the second-row seat area. Checking and restoring the wiring should resolve the issue.
B0055 in GMC Sierra: In GMC Sierra, code B0055 may occur due to a failure of the passive safety control module. Diagnosing and replacing the module if necessary can eliminate the fault.
How to diagnose error code B0055?
- Connect a diagnostic scanner to the vehicle’s OBD2 connector and read the error code.
- Check the wiring and connectors of the second-row seatbelt sensor on the right for damage or corrosion.
- Measure the sensor’s resistance with a multimeter to ensure it is functioning correctly.
- Check the passive safety system control module for faults.
- After troubleshooting, reset the error code with a diagnostic scanner and check if it reappears.
Possible Causes and Diagnostic Methods
| Possible Causes | How to Check？ |
|---|---|
| Seatbelt Sensor Fault | Measure the sensor’s resistance with a multimeter |
| Open Circuit or Short Circuit in Wiring | Visually inspect the wiring for damage |
| Poor Connector Contact or Corrosion | Clean the connector and check for corrosion |
| Safety Management Module Fault | Read the error code with a diagnostic scanner |
Required Tools: OBD2 scanner, multimeter, a set of tools for handling wiring and connectors, contact cleaner.
How to Resolve Error Code B0055?
Simple Repair Method
- Clean the seatbelt sensor connector and ensure a secure connection.
- Inspect and replace damaged wires, if necessary.
- Reset the error code after troubleshooting.
In-depth Diagnostic and Repair Solutions
- Replace the faulty second-row seatbelt sensor on the right side.
- Replace the passive safety system control module if necessary.
- Perform a comprehensive safety diagnostic to identify other possible faults.
Troubleshooting Through Symptoms
| Symptoms | Possible Solutions |
|---|---|
| Airbag light is on | Check and replace the faulty sensor or wiring |
| Seatbelt malfunction | Check connectors and wiring, replace if necessary |
| Error code reappears after resetting | Perform in-depth diagnostics and replace the faulty component |
Frequently Asked Questions about B0055
Can you drive with error code B0055?
It is not recommended, as a seatbelt system malfunction can affect airbag deployment and the overall function of the passive protection system.
Is error B0055 dangerous for passengers?
Yes, in the event of an accident, the error can affect the proper restraint of passengers, reducing the effectiveness of the safety system.
Can I reset error B0055 myself?
Yes, you can remove the error using an OBD2 diagnostic scanner, but if the fault persists, the code will reappear.
What should I do if the error reappears after resetting?
A comprehensive diagnostic is required: inspect sensors, wiring, connectors, and the passive safety system control module.
B0055 Related OBD2 Errors:
B0056 – Third Row Left Seatbelt Sensor (Subfault)
B0057 – Third Row Center Seatbelt Sensor (Subfault)
B0058 – Third Row Right Seatbelt Sensor (Subfault)
Important! Ignoring this error may lead to decreased effectiveness of the passive safety system. If fault code B0055 appears, it is recommended to immediately diagnose the passive safety system, inspect the sensors and wiring, and replace any defective parts if necessary. This will ensure the reliable operation of your vehicle’s safety systems.