B1670: Full Stage Frontal Crash Recorded

Stored crash data

What B1670 means

When a frontal impact crosses the threshold for full deployment, the control module commands both stages of the front airbags and logs the event. B1670 is that log. It is not describing a circuit condition or a sensor that quit, it is stating that this module has already done the one thing it exists to do.

From that moment the module considers itself used. It keeps the SRS light on, refuses to arm, and holds the entry no matter how many times the codes get cleared. Scan tools, battery disconnects, and fuse pulls all leave it exactly where it is, which is the behavior that defines crash data.

Common causes

• A frontal collision severe enough to command full stage deployment
• A deployment in the vehicle's history before the current owner bought it
• A salvage or auction vehicle whose module was never restored after the wreck
• A used module installed from a donor car that had already deployed
• A repaired vehicle where the body work was finished and the module was left as it was

Crash data or hardware fault?

B1670 is the permanent kind of memory. It was written during the crash and it stays written, which is the whole difference between crash data and a live circuit fault. Live faults describe a measurement happening right now and disappear on their own once the wiring reads correctly. This one needs the module restored.

Does our reset clear it?

Mail-in module reset is the correct service for B1670. Send us the control module and we restore it to its original factory state, clearing the recorded deployment so the module arms again once installed. Complete the physical repairs first: replace every airbag that fired, replace fired pretensioners, and repair the damaged wiring. A restored module in a car with spent restraints will set new codes right away.

Which makes throw it

Both Hyundai and Kia carry B1670, which makes sense given how much restraint architecture the two share. The code reads the same way on either make, and the module in front of you needs restoring regardless of which badge is on the car.

What to do next

Take inventory of everything that deployed before ordering any service, because the module reset is the last step rather than the first. Replace the front airbags and any fired pretensioners, then repair the crash damaged wiring and sensors. With the car ready, mail us the module for restoration, and call 501-988-0611 if you want to confirm your unit before shipping it. Related codes: B1650, B1762, B1657.