B3857
Incorrect Rollover Sensor Installed
B3857 is an OBD-II diagnostic trouble code meaning: Incorrect Rollover Sensor Installed. Common causes: incorrect rollover sensor installed, incompatibility of the sensor with the vehicle system. Estimated repair cost: $56–167.
Symptoms
- The security system malfunction indicator is on
- Error B3857 in diagnostic scanner memory
- Possible malfunction of airbags
Causes
- Incorrect rollover sensor installed
- Incompatibility of the sensor with the vehicle system
- Damage to the sensor wiring harness
- Software error in the passive safety module
How to Fix
- Check that the rollover sensor meets vehicle specifications
- Replace the sensor with an original or compatible analogue
- Check the integrity of the wiring harness and contacts
- Reset the error and check the system
- If necessary, reflash the passive safety module
Related codes
Error B3857 by Vehicle Brand
FAQ
What does the B3857 code mean?
B3857 is an OBD-II diagnostic trouble code that indicates: Incorrect Rollover Sensor Installed
What causes a B3857 error code?
The most common causes of B3857 include: Incorrect rollover sensor installed; Incompatibility of the sensor with the vehicle system; Damage to the sensor wiring harness; Software error in the passive safety module.
How do I fix a B3857 diagnostic trouble code?
To fix B3857: Check that the rollover sensor meets vehicle specifications. Replace the sensor with an original or compatible analogue. Check the integrity of the wiring harness and contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3857?
Do not drive — repair immediately
How much does it cost to fix B3857?
The estimated repair cost for B3857 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat