Clear Airbag Error: Guide & Tools
What does clearing an airbag error mean?
Clearing an airbag error means resetting stored fault codes in the airbag control unit using a diagnostic device. The fault memory registers disturbances in the SRS system and stores them as codes. The error can only be cleared after the cause has been fixed – without repair, the warning light returns immediately.
Important: Clearing the fault memory is not the same as a repair. It only removes the stored code – the actual cause (defective sensor, crash data, broken mat) must be fixed beforehand. Simply clearing without repair is not only pointless but can be a safety hazard.
When is clearing the airbag fault memory useful?
Clearing is useful after a successful repair to the SRS system, after reconnecting a seat connector, after a battery change with temporary voltage loss, or after fixing a loose contact. In all these cases, the cause has been fixed and the old fault entry just needs to be removed.
| Situation | Clearing useful? | Result |
|---|---|---|
| After crash data deletion | Yes | Warning light goes out permanently |
| After sensor replacement | Yes | System recognizes new part |
| After battery change | Yes | Sporadic error disappears |
| Seat connector reconnected | Yes | Contact restored |
| Cause not fixed | No | Error returns immediately |
| Crash data still stored | No | Permanent codes not deletable |
Which diagnostic devices can clear airbag errors?
Airbag fault codes can be reliably read and cleared with manufacturer-specific diagnostic devices (Xentry, ODIS, ISTA) and professional universal devices (Bosch KTS, Gutmann Mega Macs, Autel MaxiSys). Simple OBD-2 scanners from hardware stores can often only read airbag codes but not clear them.
| Device category | Examples | Clear airbag errors? |
|---|---|---|
| Manufacturer-specific | Xentry (Mercedes), ODIS (VW), ISTA (BMW) | Yes – all functions |
| Professional universal | Bosch KTS, Gutmann, Autel MaxiSys | Yes – for most brands |
| Semi-professional | Launch X431, iCarsoft, Foxwell | Partially – model-dependent |
| Simple OBD-2 scanners | ELM327, Carly, OBDEleven | Often read-only, no clearing |
| Smartphone apps | Torque, Car Scanner | No – engine fault codes only |
Why aren't simple OBD-2 scanners sufficient?
The airbag control unit communicates via special protocols that simple scanners don't support. Additionally, many manufacturers lock safety-critical functions – clearing SRS errors requires extended access rights that only professional devices provide. On some vehicles (e.g., older Golf IV), incorrect reading can even damage the control unit.
Step-by-step: Reading and clearing airbag errors
The correct procedure: First identify and fix the cause, then clear the fault memory, then perform a function test. The diagnostic device is connected to the OBD-2 interface (under the dashboard on the left) and communicates directly with the airbag control unit.
- Connect diagnostic device:Insert OBD-2 connector under the dashboard
- Select control unit:Access the airbag/SRS control unit in the menu
- Read fault codes:Display and document stored codes
- Interpret fault code:What does the code mean? Which component is affected?
- Fix the cause:Replace defective part, clean connectors, delete crash data
- Clear fault memory:Reset all stored codes
- Turn ignition off/on:Let the system restart
- Function test:Check if the warning light goes out after 2-5 seconds
What are permanent fault codes?
Permanent fault codes (crash data) are stored in the control unit during an accident and cannot be cleared with a standard diagnostic device. They require special crash data deletion by a specialist or replacement of the control unit. These codes remain even after disconnecting the battery.
The difference from normal fault codes: Permanent codes are stored hardware-side in the EEPROM of the control unit. They serve as an accident log and prevent a control unit from an accident vehicle from being reused undetected. Only specialized software or direct access to the memory chip can delete this data.
Why shouldn't you clear airbag errors yourself?
Independently clearing airbag errors without professional knowledge carries risks: the cause remains unknown, safety-critical defects are masked, and on some vehicles, incorrect reading can damage the control unit. Work on the SRS system is subject to explosives regulations and may only be performed by trained personnel.
- Cause is not fixed:The error returns immediately or on the next driving cycle
- Safety risk:A real defect is masked – in an emergency, the airbag may not deploy
- Control unit damage:On some models, incorrect communication can destroy the control unit
- Legal issues:Clearing the fault memory before a sale without fixing the defect can be considered fraud
- Permanent codes:Crash data cannot be cleared with standard tools anyway
Professional solution: Crash data deletion at Airbag24
Airbag24 offers professional crash data deletion and control unit repair for all makes and models. With over 20 years of experience and more than 20,000 repaired control units, the result is TÜV-certified. Repair is up to 50% cheaper than a new unit from an authorized dealer.
Find exact prices for control unit repair for your vehicle model in our shop. We're happy to help – whether crash data deletion, control unit repair, or replacement of individual SRS components.
Frequently asked questions about clearing airbag errors
Here you'll find answers to the most important questions about clearing airbag fault codes.
Can I clear the airbag error by disconnecting the battery?
On some vehicles, a brief voltage reset can clear sporadic errors. However, permanent codes (crash data) remain stored even without power. This method is not a substitute for professional diagnosis.
What does fault memory reading cost at a workshop?
Reading the fault memory alone costs between 30 and 80 euros at independent workshops. Some workshops offer the service free of charge if repair follows. At Airbag24, diagnosis is part of the control unit repair.
Why does the airbag error return after clearing?
If the error returns immediately or after a short drive, there is an active defect. The control unit detects the fault during the next self-test and stores the code again. In this case, the cause must be fixed first.
Can clearing the fault memory trigger the airbag?
With correct procedure using an appropriate diagnostic device, there is no risk of airbag deployment. With improper handling or damaged cables, malfunctions could theoretically occur – therefore, the work should only be performed by trained personnel.