B130455 - Internal fault in the control unit airbag control unit fault

What does error code B130455 mean in the airbag control unit?

Error code B130455 reports an internal fault in the airbag control unit, meaning a fault located in the control unit itself, and the control unit stores this fault in the fault memory. In doing so, it switches on the airbag warning light on the dashboard so that you can directly recognise the stored restraint system fault.

The restraint system comprises the airbag control unit, the airbag modules and the sensors. The control unit evaluates the signals and stores any deviations it detects as faults.

As long as the fault remains stored, the airbag warning light stays lit. The code cannot simply be cleared and remains in the fault memory.

How do you recognise error code B130455?

Error code B130455 shows itself by the airbag warning light being permanently lit and by the code being stored in the control unit's fault memory. It cannot be permanently erased, and without a diagnostic tool you only see the warning light in the vehicle, not the code itself.

If the airbag warning light on the dashboard does not go out after the ignition is switched on, a fault is stored in the airbag system. With this code, such a fault lies in the control unit itself.

Whether error code B130455 is present is only shown by reading it out. For this, the diagnostic tool is connected to the vehicle, and the code appears in the list of stored faults.

What causes error code B130455?

Error code B130455 is caused by a fault in the airbag control unit itself, which can arise from crash data, ageing components, moisture or voltage spikes. Soldered joints in the control unit and corrosion are also possible triggers, as is a weak battery or a jump start that generates voltage spikes.

• Crash data after an accident
• Ageing electronic components in the control unit
• Soldered joints on the control unit's circuit board
• Moisture or corrosion in the control unit
• Voltage spikes from a weak battery or a jump start

Which cause applies in a given case is only shown by inspecting the control unit. This also applies when nothing is visibly wrong with the vehicle.

In which vehicles does error code B130455 occur?

Error code B130455 is known on Audi vehicles, namely the Audi S3 8YA Sportback. The list is therefore not complete, and on other vehicles, including other Audi model series, the meaning of the code may differ from this information.

So far, only the Audi brand and the Audi S3 8YA Sportback have been named. Whether a particular vehicle shows the code can only be determined with a diagnostic tool at the fault memory.

How is error code B130455 resolved?

Error code B130455 is resolved by having the fault memory read out with a diagnostic tool and by clarifying the cause precisely before any work is carried out. If the cause lies in the airbag control unit, it is removed after the battery has been disconnected and sent to Airbag24 together with a repair order created online.

Work on the airbag system should be carried out by qualified specialists. First have the fault memory read out with a diagnostic tool. If the findings point to connectors, wiring, an airbag module or a sensor, have these parts checked first at a specialist workshop.

If the cause lies in the airbag control unit itself, for example as an internal fault or due to crash data, proceed as follows: first disconnect the battery, then remove the control unit. Next, 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.