B1029
Diagnosis Sensor Unit
B1029 is an OBD-II diagnostic trouble code meaning: Diagnosis Sensor Unit. Common causes: damaged security system wiring harness, poor contact in the connectors of the diagnostic unit. Estimated repair cost: $56–167.
Symptoms
- Airbag light is on
- Security system disabled
- Error persists after reset
Causes
- Damaged security system wiring harness
- Poor contact in the connectors of the diagnostic unit
- Faulty passive safety control unit
- There is a malfunction in the airbag circuit
How to Fix
- Check wiring harness for damage
- Check the contacts in the connectors of the diagnostic unit
- Read decrypted fault codes in the security system
- If necessary, replace the diagnostic unit
Related codes
FAQ
What does the B1029 code mean?
B1029 is an OBD-II diagnostic trouble code that indicates: Diagnosis Sensor Unit
What causes a B1029 error code?
The most common causes of B1029 include: Damaged security system wiring harness; Poor contact in the connectors of the diagnostic unit; Faulty passive safety control unit; There is a malfunction in the airbag circuit.
How do I fix a B1029 diagnostic trouble code?
To fix B1029: Check wiring harness for damage. Check the contacts in the connectors of the diagnostic unit. Read decrypted fault codes in the security system. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1029?
Do not drive — repair immediately
How much does it cost to fix B1029?
The estimated repair cost for B1029 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat