Damaged or chafed wiring in the right curtain airbag deployment circuit, often at the roof rail or pillar pass-through; Loose, corroded or unseated electrical connector at the right curtain airbag inflator or at the restraints control module; Open or shorted clock spring or spiral cable affecting the side airbag circuit on some layouts; Failed right curtain airbag inflator or module with an internal open circuit; Water intrusion or corrosion in the roof rail harness causing high resistance in the deployment loop; Restraints control module internal fault or corrupted configuration after a battery or module replacement; Aftermarket accessories or previous body repair that disturbed the curtain airbag harness

DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B002A

B002ARight Curtain Deployment Control 2

Q: What does code B002A mean?

Right Curtain Deployment Control 2. B002A indicates that the restraints control module has detected a fault in the second deployment control circuit for the right-side curtain airbag, which is the inflator loop that fires the curtain to protect occupants' heads in a side impact. The module monitors circuit resistance and continuity and sets this code when the signal falls outside the expected range, so the airbag may not deploy correctly in a crash.

B002A indicates that the restraints control module has detected a fault in the second deployment control circuit for the right-side curtain airbag, which is the inflator loop that fires the curtain to protect occupants' heads in a side impact. The module monitors circuit resistance and continuity and sets this code when the signal falls outside the expected range, so the airbag may not deploy correctly in a crash.

SystemBody

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

Airbag warning light illuminated steadily on the instrument cluster
Often no symptoms besides the warning light, with no change in how the vehicle drives
Passenger airbag or curtain airbag status indicator showing a fault or 'off' condition
A stored history of intermittent airbag warnings after driving over rough roads or hitting a curb
In some vehicles, a chime or message reminding you to service the restraint system

Common causes, most likely first

Damaged or chafed wiring in the right curtain airbag deployment circuit, often at the roof rail or pillar pass-through
Loose, corroded or unseated electrical connector at the right curtain airbag inflator or at the restraints control module
Open or shorted clock spring or spiral cable affecting the side airbag circuit on some layouts
Failed right curtain airbag inflator or module with an internal open circuit
Water intrusion or corrosion in the roof rail harness causing high resistance in the deployment loop
Restraints control module internal fault or corrupted configuration after a battery or module replacement
Aftermarket accessories or previous body repair that disturbed the curtain airbag harness

How to diagnose and fix it

Scan all modules and record freeze-frame data and any related body codes before clearing anything
Inspect the right curtain airbag connector and roof rail harness for looseness, corrosion, chafing or water intrusion
Measure deployment circuit resistance at the inflator connector with the battery disconnected and the module isolated, comparing to the manufacturer's specification
Perform a wiggle and continuity test on the harness while watching live resistance or code status to catch intermittent faults
Check the restraints control module connector and ground points for tightness and corrosion
If the circuit tests good, substitute a known-good inflator or module only per the service procedure, never with the system powered
Clear codes, verify the repair with a full scan and a road test over rough surfaces, and confirm the airbag light stays off

Why the curtain airbag light comes back

A common miss is a connector that looks seated but has a backed-out terminal, so always pull-test the pins rather than trusting the latch alone.
Body shops often pinch the roof rail harness during headliner or pillar trim work, creating a high-resistance fault that only appears after the repair.
The code does not always mean the airbag itself is bad; a corroded ground or a low battery during module programming can set a false deployment-circuit fault.
Some vehicles require the restraints control module to be configured or learned after replacement, and skipping that step leaves B002A stored even with good hardware.
Never probe airbag deployment circuits with a powered test light or ordinary ohmmeter unless the manufacturer's procedure allows it, because the inflator can deploy unexpectedly.

Can I keep driving with B002A?

The vehicle is drivable, but the right curtain airbag may not deploy in a side impact, so avoid aggressive driving and have the fault diagnosed promptly. Do not attempt to repair or disconnect airbag wiring yourself unless you are trained and the battery has been properly isolated.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.