SRS-0115 airbag control unit fault

What does error code SRS-0115 indicate in the airbag control unit?

Error code SRS-0115 is a manufacturer-specific code that points to a serious internal defect in the airbag control unit. Although specific public information about this code is limited, it typically indicates a hardware fault on the circuit board, similar to common error codes such as B1111 or 65535 (control unit defective).

Such an internal fault prevents the control unit from correctly processing signals from the crash sensors and activating restraint systems like airbags and seatbelt pretensioners in the event of a collision. For safety reasons, the module enters a passive, faulty state.

The cause is usually a defect in an electronic component inside the device, such as microprocessors or memory chips. As a result, the system remains non-functional until the hardware issue is resolved.

How can you recognize error code SRS-0115?

The most obvious symptom of error SRS-0115 is the permanently illuminated airbag warning light on the instrument panel. In this state, the entire passive safety system is disabled and offers no protection. In many cases, communication with the control unit via a diagnostic tool is also impossible.

The airbag warning light (usually pictogram of a passenger with an airbag) does not turn off after starting the vehicle, as it normally would. It continuously alerts the driver to a critical system malfunction.

When attempting to read the fault memory, the diagnostic tool may fail to establish communication with the airbag control unit. This behavior is comparable to the general error code B1000, which likewise indicates a communication failure due to an internal defect.

What causes SRS-0115?

The primary cause of error code SRS-0115 is internal electronic malfunctions within the airbag control unit. These include component failures due to aging, voltage fluctuations, or external factors such as moisture ingress leading to corrosion on the circuit board. Stored crash data can also lock the unit.

Often, poor connector contacts or damaged cables result in unstable power supplies, gradually damaging electronic components inside the control unit. Water damage is another frequent source of failure.

Although SRS-0115 is specific, the underlying issues are often identical to those triggering more general error codes like 93F9 (internal airbag control unit error) or 65535 (control unit defective). These almost always point to a hardware problem.

Following a crash, so-called crash data is stored in the control unit’s memory. This data permanently locks the module and must be professionally erased before the unit can be restored to operational status.

In which models does error SRS-0115 occur?

Error code SRS-0115 is specific to Volvo vehicles. At Airbag24, we professionally repair this error code for third-generation Volvo S60 models, including facelift versions, offering a cost-effective and sustainable alternative to expensive new purchases.

At Airbag24, we repair error code SRS-0115 for the following Volvo models:

Volvo S60 3rd Generation (model years 2018–2022)

Volvo S60 3rd Generation Facelift (from model year 2022 onward)

How is SRS-0115 professionally repaired?

Professional repair of error SRS-0115 focuses on eliminating the internal hardware defect. After submission to Airbag24, the control unit undergoes a detailed analysis during which defective components on the circuit board are identified and replaced. The system is then reset and thoroughly tested.

At Airbag24, repairs follow a proven, systematic process. Upon receipt of the removed control unit, a thorough visual inspection of all components and solder joints on the circuit board is performed first.

Using specialized diagnostic equipment, the internal fault is precisely localized. Repairs are carried out at the component level, meaning only defective electronic parts—such as resistors, capacitors, or processors—are replaced.

After successful hardware repair, any stored crash data is erased from the control unit’s memory. The system is fully reset to restore full functionality.

Final tests ensure that the control unit communicates flawlessly and performs all functions correctly. Airbag24 provides 2 years' statutory liability for defects on every repair.