B1004
Diagnosis Sensor Unit
B1004 is an OBD-II diagnostic trouble code meaning: Diagnosis Sensor Unit. Common causes: damage to the srs wiring harness, malfunction of the srs diagnostic unit. Estimated repair cost: $56–167.
Symptoms
- The SRS indicator on the dashboard is on
- The passive restraint system is not activated during the test
- Errors in other vehicle systems
Causes
- Damage to the SRS wiring harness
- Malfunction of the SRS diagnostic unit
- Short circuit in SRS circuit
- Problems with the unit software
How to Fix
- Check the SRS wiring harness for damage.
- Scan the SRS system for additional errors
- Check the power and ground of the diagnostic unit
- Replace the diagnostic unit if necessary
- Reset errors and check system operation
Related codes
FAQ
What does the B1004 code mean?
B1004 is an OBD-II diagnostic trouble code that indicates: Diagnosis Sensor Unit
What causes a B1004 error code?
The most common causes of B1004 include: Damage to the SRS wiring harness; Malfunction of the SRS diagnostic unit; Short circuit in SRS circuit; Problems with the unit software.
How do I fix a B1004 diagnostic trouble code?
To fix B1004: Check the SRS wiring harness for damage.. Scan the SRS system for additional errors. Check the power and ground of the diagnostic unit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1004?
Do not drive — repair immediately
How much does it cost to fix B1004?
The estimated repair cost for B1004 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat