B002A high Severity

B002A: Right Curtain Deployment Control 2 (Subfault)

Airbag system warning light illuminated; potential non‑deployment of right curtain airbag in side impact

Overview

OBD‑II code B002A indicates a fault in the right curtain airbag deployment control circuit, typically related to wiring, connectors, sensor errors, or airbag module faults.

Common Symptoms

  • Airbag warning light on instrument cluster
  • Possible SRS warning message
  • Vehicle may fail safety inspection

Most Common Causes

Faulty right curtain airbag module medium

Airbag itself may be defective or damaged

Wiring harness open circuit, short, or poor connection high

Common electrical cause affecting deployment control circuit

Faulty airbag control module medium

Central airbag controller may malfunction

Sensor fault on right side impact detection medium

Sensor calibration or failure triggers fault

Diagnostic Steps

  1. Connect OEM diagnostic tool or capable SRS scanner and read all related codes
    Expected: Retrieve B002A and any related airbag system codes
    Interpretation: Confirms presence and identifies sub‑codes if available
  2. Visually inspect right curtain airbag wiring harness and connectors
    Expected: No breaks, corrosion, bent pins, or shorts
    Interpretation: Wiring integrity issues often trigger B002A
  3. Test continuity and resistance of wiring to right curtain airbag
    Expected: Continuity within specification
    Interpretation: Open or short circuits indicate wiring repair needed
  4. Check airbag control module functionality and communication
    Expected: Module responds normally
    Interpretation: Unresponsive or error status suggests module fault

Repair Solutions

Repair or replace damaged wiring/connectors medium
Estimated Cost: $100 - $500

Costs vary by vehicle and labor; safety system repair requires caution

Replace right curtain airbag module hard
Estimated Cost: $500 - $1500

Airbag parts and deployment system components are expensive

Repair/replace airbag control module hard
Estimated Cost: $600 - $2000

May require programming with OEM tools

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Mistaking general SRS warning for unrelated electrical issues

Frequently Asked Questions

Technical definition of B002A OBD-II Code

Right Curtain Deployment Control 2 (Subfault) is the standard definition for B002A. This diagnostic code is triggered when the ECU detects a problem in the Sensors.

Can B002A cause engine damage?

This is a high priority issue. Airbag system warning light illuminated; potential non‑deployment of right curtain airbag in side impact

Symptoms associated with DTC B002A

You may experience the following: Airbag warning light on instrument cluster, Possible SRS warning message, Vehicle may fail safety inspection.

Potential causes for OBDII code B002A

It can be caused by several factors, most notably: Faulty right curtain airbag module, Wiring harness open circuit, short, or poor connection, Faulty airbag control module.

What is the price difference for fixing B002A?

It depends on what needs to be fixed. Repair or replace damaged wiring/connectors repairs are cheaper (~$500), while Repair/replace airbag control module repairs are on the higher end (~$2000).

Is the B002A code specific to Nissan?

The B002A code is a generic powertrain code, meaning it applies to almost all makes and models, such as Honda, Toyota, VW, Ford, and Chevy.

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