B1001
Diagnosis Sensor Unit
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)
Symptoms
- SRS/airbag indicator is on
- SRS does not activate during diagnostics
- Errors in related systems (for example, pretensioners)
Causes
- Wiring harness damage
- Corrosion of contacts in connectors
- Diagnostic unit software failure
- Malfunction of the unit itself (rarely)
How to Fix
- Read error codes with SRS scanner
- Check the integrity of the wiring harness and connectors
- Clean contacts from corrosion
- Reflash the diagnostic unit (if possible)
- Replace Diagnosis Sensor Unit if necessary