OBD Guide

B0056

Third Row Left Seat Belt Sensor

B0056 is an OBD-II diagnostic trouble code meaning: Third Row Left Seat Belt Sensor. Common causes: open or shorted wiring harness, seat belt sensor malfunction. Estimated repair cost: $22–111.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–111 (est.)

Symptoms

  • Airbag light is on
  • Incorrect operation of the seat belt warning system
  • Error B0056 in the diagnostic scanner memory

Causes

  • Open or shorted wiring harness
  • Seat belt sensor malfunction
  • Damaged or corroded connectors
  • Failure in the security control module

How to Fix

  1. Conduct a visual inspection of the wiring harness and connectors
  2. Check the resistance of the seat belt sensor
  3. Check power and ground in the sensor circuit
  4. If necessary, replace the sensor or repair the wiring harness
  5. Erase the error from the module memory after repair

Related codes

Error B0056 by Vehicle Brand

FAQ

What does the B0056 code mean?

B0056 is an OBD-II diagnostic trouble code that indicates: Third Row Left Seat Belt Sensor

What causes a B0056 error code?

The most common causes of B0056 include: Open or shorted wiring harness; Seat belt sensor malfunction; Damaged or corroded connectors; Failure in the security control module.

How do I fix a B0056 diagnostic trouble code?

To fix B0056: Conduct a visual inspection of the wiring harness and connectors. Check the resistance of the seat belt sensor. Check power and ground in the sensor circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B0056?

Do not drive — repair immediately

How much does it cost to fix B0056?

The estimated repair cost for B0056 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat