B1127
Diagnosis Sensor Unit
B1127 is an OBD-II diagnostic trouble code meaning: Diagnosis Sensor Unit. Common causes: damage to the srs wiring harness, corrosion of contacts in the connectors of the diagnostic unit. Estimated repair cost: $56–167.
Symptoms
- The SRS/airbag indicator on the dashboard is on
- The passive safety system does not activate in the event of an accident
- The error persists after being reset by the scanner
Causes
- Damage to the SRS wiring harness
- Corrosion of contacts in the connectors of the diagnostic unit
- Malfunction of the sensor diagnostic unit itself
- Problems with power supply or mass of the unit
- Previous injuries as a result of an accident
How to Fix
- Diagnose the SRS system using a scanner
- Check the integrity of the wiring harness and contacts
- Test the power and ground of the diagnostic unit
- If necessary, replace the sensor diagnostic unit
- Reset errors and check system operation
Related codes
FAQ
What does the B1127 code mean?
B1127 is an OBD-II diagnostic trouble code that indicates: Diagnosis Sensor Unit
What causes a B1127 error code?
The most common causes of B1127 include: Damage to the SRS wiring harness; Corrosion of contacts in the connectors of the diagnostic unit; Malfunction of the sensor diagnostic unit itself; Problems with power supply or mass of the unit.
How do I fix a B1127 diagnostic trouble code?
To fix B1127: Diagnose the SRS system using a scanner. Check the integrity of the wiring harness and contacts. Test the power and ground of the diagnostic unit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1127?
Do not drive — repair immediately
How much does it cost to fix B1127?
The estimated repair cost for B1127 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat