0131 - Internal component fault, initialisation failed airbag control unit fault

What does error code 0131 mean in the airbag control unit?

Error code 0131 reports an internal component fault that occurs when the airbag control unit starts up. The control unit of the restraint system itself is affected, not its wiring: it stores the fault in the fault memory and switches on the airbag warning light permanently, which indicates a fault in the restraint system.

The airbag control unit evaluates the sensors and the airbag modules and, in an emergency, decides whether the airbags are deployed. With error code 0131 the fault lies within the control unit itself and already occurs at start-up. The airbag warning light draws your attention to this fault.

The code therefore describes an internal component fault, and not a defect outside the unit.

How do you recognise error code 0131?

You recognise error code 0131 by the airbag warning light staying on permanently and by the code appearing in the fault memory of the control unit. The code cannot be permanently erased, not even by clearing the fault memory, and it is read out with a diagnostic tool.

The airbag warning light indicates this state for as long as the code is stored. The entry is held in the memory of the control unit and not on an individual component, so you cannot recognise it by any externally visible damage.

What causes error code 0131?

Error code 0131 arises from an internal fault in the airbag control unit itself and not from a line outside the unit. The causes lie in the electronics of the unit or in external influences acting on the unit, such as voltage spikes from a weak battery or a jump-start.

• aged electronic components in the control unit
• solder joints on the electronics
• moisture or corrosion in the unit
• voltage spikes from a weak battery or from a jump-start

In which vehicles does error code 0131 occur?

Error code 0131 is known on Aston Martin vehicles, for example on the Cygnet, DB7, DB9, DB11, DB12, DBS, DBX, Rapide, Vanquish, Vantage and Virage models. The list is not complete, and on other vehicles the meaning of the code may differ.

All the models named belong to the make Aston Martin. If your vehicle does not appear in this list, have the code assessed by a specialist workshop.

How is error code 0131 resolved?

Error code 0131 is resolved by first reading out the fault memory with a diagnostic tool so that the cause is established. If the cause lies in the airbag control unit, you disconnect the battery before removing the unit and send it in via a repair order created online to Airbag24, where it is inspected, repaired and tested.

Safety note: work on the airbag system should be left to qualified professionals. If you do not read out the fault memory yourself, have a specialist workshop do it.

First you disconnect the battery, then you remove the control unit. You then create a repair order online and send the unit to Airbag24. Checking, repairing and testing usually take 3–4 working days.

The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.