B1074
Diagnosis Sensor Unit
B1074 is an OBD-II diagnostic trouble code meaning: Diagnosis Sensor Unit. Common causes: open or short circuit in wiring harness, corrosion of connector contacts. Estimated repair cost: $56–167.
Symptoms
- SRS/airbag indicator is on
- The system does not pass self-diagnosis when the ignition is turned on
- Lack of response to diagnostic equipment
Causes
- Open or short circuit in wiring harness
- Corrosion of connector contacts
- Failure of the diagnostic unit
- On-board voltage failures
- SRS controller software error
How to Fix
- Check the condition of the system wiring harness and connectors
- Scan the system for related errors
- Measure power and ground at the connectors of the diagnostic unit
- Replace Diagnosis Sensor Unit if necessary
- Adapt the system after repair
Related codes
FAQ
What does the B1074 code mean?
B1074 is an OBD-II diagnostic trouble code that indicates: Diagnosis Sensor Unit
What causes a B1074 error code?
The most common causes of B1074 include: Open or short circuit in wiring harness; Corrosion of connector contacts; Failure of the diagnostic unit; On-board voltage failures.
How do I fix a B1074 diagnostic trouble code?
To fix B1074: Check the condition of the system wiring harness and connectors. Scan the system for related errors. Measure power and ground at the connectors of the diagnostic unit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1074?
Do not drive — repair immediately
How much does it cost to fix B1074?
The estimated repair cost for B1074 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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