B1031
Diagnosis Sensor Unit
B1031 is an OBD-II diagnostic trouble code meaning: Diagnosis Sensor Unit. Common causes: malfunction of the diagnostic sensor unit, wiring harness damage. Estimated repair cost: $167–444.
Symptoms
- SRS/Airbag light is on
- Disable some security features
- Inability to activate seat belt pretensioners
Causes
- Malfunction of the diagnostic sensor unit
- Wiring harness damage
- Corrosion of electrical contacts
- Unit power problems
- Software glitch
How to Fix
- Resetting the error with a scanner and checking for reappearance
- Visual inspection of the wiring harness and contacts
- Checking the unit supply voltage
- Diagnostics of the sensor unit on the stand
- Replacing a faulty sensor unit
Related codes
FAQ
What does the B1031 code mean?
B1031 is an OBD-II diagnostic trouble code that indicates: Diagnosis Sensor Unit
What causes a B1031 error code?
The most common causes of B1031 include: Malfunction of the diagnostic sensor unit; Wiring harness damage; Corrosion of electrical contacts; Unit power problems.
How do I fix a B1031 diagnostic trouble code?
To fix B1031: Resetting the error with a scanner and checking for reappearance. Visual inspection of the wiring harness and contacts. Checking the unit supply voltage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1031?
Do not drive — repair immediately
How much does it cost to fix B1031?
The estimated repair cost for B1031 is $167–444. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat