B1043
Diagnosis Sensor Unit
B1043 is an OBD-II diagnostic trouble code meaning: Diagnosis Sensor Unit. Common causes: damage to the wiring harness (harness), corroded or oxidized connectors. Estimated repair cost: $56–167.
Symptoms
- The airbag light is on
- The passive safety system does not activate
- Error does not go away after reset
Causes
- Damage to the wiring harness (harness)
- Corroded or oxidized connectors
- Internal diagnostic unit fault
- Power or grounding problems
How to Fix
- Check wiring harness (harness) for damage
- Clean and check the diagnostic unit connectors
- Check power supply and grounding of the unit
- Replace the diagnostic unit if necessary
Related codes
FAQ
What does the B1043 code mean?
B1043 is an OBD-II diagnostic trouble code that indicates: Diagnosis Sensor Unit
What causes a B1043 error code?
The most common causes of B1043 include: Damage to the wiring harness (harness); Corroded or oxidized connectors; Internal diagnostic unit fault; Power or grounding problems.
How do I fix a B1043 diagnostic trouble code?
To fix B1043: Check wiring harness (harness) for damage. Clean and check the diagnostic unit connectors. Check power supply and grounding of the unit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1043?
Do not drive — repair immediately
How much does it cost to fix B1043?
The estimated repair cost for B1043 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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