B0021
Left Curtain Deployment Control 1
B0021 is an OBD-II diagnostic trouble code meaning: Left Curtain Deployment Control 1. Common causes: shock sensor malfunction, wiring problems. Estimated repair cost: $56–333.
Symptoms
- SRS (airbag) indicator is on
- The safety system may not work in an accident
- The error is stored in the ECU memory
Causes
- Shock sensor malfunction
- Wiring problems
- Airbag module malfunction (left curtain)
- Problems with the SRS control unit
- Contact corrosion
How to Fix
- Diagnose the SRS system using a scanner
- Check the integrity of wiring and contacts
- Check the shock sensor
- If necessary, replace the airbag module
- Reset the error and check the system
Related codes
Error B0021 by Vehicle Brand
FAQ
What does the B0021 code mean?
B0021 is an OBD-II diagnostic trouble code that indicates: Left Curtain Deployment Control 1
What causes a B0021 error code?
The most common causes of B0021 include: Shock sensor malfunction; Wiring problems; Airbag module malfunction (left curtain); Problems with the SRS control unit.
How do I fix a B0021 diagnostic trouble code?
To fix B0021: Diagnose the SRS system using a scanner. Check the integrity of wiring and contacts. Check the shock sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B0021?
Do not drive — repair immediately
How much does it cost to fix B0021?
The estimated repair cost for B0021 is $56–333. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat