What is a B0057 fault code?
The B0057 fault code, applicable to all car manufacturers, means “Third Row Center 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 B0057 error code (how to diagnose a problem):
- The Airbag Malfunction Indicator (SRS) light illuminates.
- The airbag system can be deactivated.
- The check fails due to an active error code.
- Errors may also occur in other safety systems.
Main Causes of the B0057 Error Code:
- Damaged or worn belt sensor wiring.
- Corrosion or contamination of the connector.
- The seatbelt sensor itself is faulty.
- The Passive Safety Management Module (SRS) is malfunctioning.
B0057 Error Codes in Different Vehicles:
Chevrolet Tahoe B0057: In the Chevrolet Tahoe model, code B0057 may be related to damage to the third-row seatbelt sensor wiring, especially at the joint. B0057 in Yukon GMC: In the GMC Yukon, seatbelt sensor connector corrosion due to moisture is often the cause of the error.
B0057 in Cadillac Escalade: In the Cadillac Escalade, error B0057 may occur due to a faulty SRS control module, requiring flashing or replacement.
B0057 in Chevrolet Suburban: In the Chevrolet Suburban, code B0057 is usually related to wear or damage to the third-row seat wiring.
B0057 in GMC Acadia: In the GMC Acadia, error B0057 may be caused by a faulty seatbelt sensor itself or its connector.
How to diagnose error code B0057?
- Connect a diagnostic scanner to the OBD-II connector and read the error code.
- Inspect the wiring and connector condition of the third-row seatbelt sensor.
- Clean the connector and check for corrosion or damage.
- Replace the seatbelt sensor if necessary.
- Clear the error code and check if the B0057 code reappears.
Possible Causes and Diagnostic Methods
| Possible Causes | How to Check？ |
|---|---|
| Damaged Wiring | Visually inspect the integrity of the wiring |
| Console Corrosion | Clean and treat the connector using a special product |
| Seat Belt Sensor Failure | Replace the sensor and check the system |
| SRS Management Module Failure | Diagnose with a dedicated scanner |
Required Tools: OBD2 scanner, multimeter, contact cleaner, trim removal tool kit
How to resolve error code B0057?
Simple Repair Method
- Clean and treat the seatbelt sensor connector.
- Inspect and repair damaged wiring.
- Reset the error code after troubleshooting.
In-depth Diagnosis and Repair Solution
- Replace the faulty seatbelt sensor.
- Identify and replace the SRS control module if necessary.
- Perform a comprehensive diagnosis of the passive safety system.
Troubleshooting through Symptoms
| Symptoms | Possible Solutions |
|---|---|
| SRS indicator light is on | Inspect and clean the connector, reset the error |
| Code B0057 repeats after resetting | Replace the seatbelt sensor |
| Passive safety system malfunction | Diagnosis and repair of the SRS control module |
Frequently Asked Questions about B0057
Can I drive with the B0057 error code?
Not recommended, as this vulnerability affects passive safety systems. In the event of an accident, airbags or belt tensioners may fail.
What happens if I don’t fix error B0057?
With this error, safety systems may malfunction, increasing the risk of injury in an accident. Additionally, the vehicle may fail inspection.
Can I fix error B0057 myself?
Yes, if the cause is dirt or poor connector contact. However, if the sensor itself or the SRS module malfunctions, it is best to contact a service provider.
B0057 Related OBD2 Errors
B0056 – Third Row Left Seatbelt Sensor (Subfault)
B0058 – Third Row Right Seatbelt Sensor (Subfault)
B0060 – Driver Seatbelt Tension Sensor (Subfault)
Important! Ignoring this error may lead to a decrease in the effectiveness of the passive safety system in the event of an accident. It is necessary to diagnose the wiring and connectors and check the availability of the sensor itself.