B0021

Left Curtain Deployment Control 1

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–333 (est.)

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

B0020 B0022 B0010 B0011