Airbags

B002A — Right Curtain Airbag Deployment Control Circuit 2 Fault

Severity: high Drive with care, to a shop

What B002A means

The airbag (SRS) control module found a problem in the circuit that controls deployment of the right curtain airbag (control circuit 2) during its self-test. Normally the module continuously monitors the airbag's squib circuit and fires it only during a serious side impact or rollover. If the circuit is open, shorted or out of its resistance range, the module flags the curtain airbag as faulty.

Symptoms

  • SRS / airbag warning light on the dash
  • Possible airbag system fault message
  • Light stays on after the ignition is turned on
  • May fail a safety inspection

Possible causes

  1. Open, short or poor connection in the right curtain airbag wiring
  2. Corroded or loose connector behind the right pillar trim or headliner
  3. Faulty right curtain airbag module (squib)
  4. Faulty SRS control module
  5. Right side impact sensor fault
  6. Wiring damage after body work, trim removal or seat replacement

How to diagnose

  1. Scan all modules with an SRS-capable tool and note any related side sensor or airbag codes
  2. Save freeze-frame data, clear the code and see whether it returns immediately or only over bumps
  3. Inspect the right curtain airbag connector and the yellow SRS connectors for corrosion, bent pins and unlatched locks
  4. Inspect the harness along the right pillar and roofline for pinching or past repairs
  5. Disconnect the battery and wait as the manufacturer specifies, then test circuit resistance using the factory procedure only, never probing the airbag with a regular meter
  6. Check the right side impact sensors and their wiring
  7. If wiring is good, test the SRS module and curtain module by substituting a known good part

Common fixes

  • Repair the wiring or replace the damaged harness or connector
  • Replace the right curtain airbag module
  • Replace or reprogram the SRS control module
  • Replace a faulty side impact sensor
  • Clear codes after repair and confirm the warning light goes out

Questions and answers

Can I drive with code B002A?

Yes, the car will run, but the right curtain airbag may not deploy in a crash. Get it diagnosed as soon as you can.

Can I test the airbag with a multimeter myself?

No. Applying meter current to an airbag squib can set it off. SRS circuits should be tested only with the factory procedure and the battery disconnected.

Why did B002A come back after clearing it?

The fault is still present, most often in the wiring, a connector or the curtain module. Clearing only erases the stored code and does not fix the cause.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.