B2909
Belt Tension Sensor Fault
B2909 is an OBD-II diagnostic trouble code meaning: Belt Tension Sensor Fault. Common causes: belt tension sensor malfunction, broken or damaged wiring harness to the sensor. Estimated repair cost: $56–167.
Symptoms
- Airbag light is on
- Security error message on dashboard
- Incorrect operation of seat belt pretensioners
Causes
- Belt tension sensor malfunction
- Broken or damaged wiring harness to the sensor
- Short circuit in the sensor circuit
- Problems with the security control unit
How to Fix
- Conduct diagnostics of the passive safety system
- Check the integrity of the wiring harness to the sensor
- Check the resistance of the belt tension sensor
- If necessary, replace the belt tension sensor
- Reset errors and check system operation
Related codes
FAQ
What does the B2909 code mean?
B2909 is an OBD-II diagnostic trouble code that indicates: Belt Tension Sensor Fault
What causes a B2909 error code?
The most common causes of B2909 include: Belt tension sensor malfunction; Broken or damaged wiring harness to the sensor; Short circuit in the sensor circuit; Problems with the security control unit.
How do I fix a B2909 diagnostic trouble code?
To fix B2909: Conduct diagnostics of the passive safety system. Check the integrity of the wiring harness to the sensor. Check the resistance of the belt tension sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B2909?
Do not drive — repair immediately
How much does it cost to fix B2909?
The estimated repair cost for B2909 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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