B3856
Discard Rollover Sensor
B3856 is an OBD-II diagnostic trouble code meaning: Discard Rollover Sensor. Common causes: rollover sensor malfunction, open or short circuit in the sensor wiring harness. Estimated repair cost: $111–333.
Symptoms
- Airbag light is on
- The passive safety system does not activate in the event of an accident
- Error B3856 is stored in the ECU memory
Causes
- Rollover sensor malfunction
- Open or short circuit in the sensor wiring harness
- Poor contact in the sensor connector
- SRS control unit malfunction
How to Fix
- Diagnostics of the passive safety system using a scanner
- Checking the integrity of the sensor wiring harness
- Checking the contacts in the sensor connector
- Replacing the rollover sensor if necessary
- Resetting the error and checking the system operation
Related codes
Error B3856 by Vehicle Brand
FAQ
What does the B3856 code mean?
B3856 is an OBD-II diagnostic trouble code that indicates: Discard Rollover Sensor
What causes a B3856 error code?
The most common causes of B3856 include: Rollover sensor malfunction; Open or short circuit in the sensor wiring harness; Poor contact in the sensor connector; SRS control unit malfunction.
How do I fix a B3856 diagnostic trouble code?
To fix B3856: Diagnostics of the passive safety system using a scanner. Checking the integrity of the sensor wiring harness. Checking the contacts in the sensor connector. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3856?
Do not drive — repair immediately
How much does it cost to fix B3856?
The estimated repair cost for B3856 is $111–333. Actual cost depends on your vehicle, location, and labor rates.
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