B1498 airbag control unit fault

What does error code B1498 mean in the airbag control unit?

Error code B1498 is a specific OBD-II code indicating a critical internal hardware or memory fault in the airbag control unit (SRS ECU). In particular, on Mitsubishi models, it points to a ROM or RAM failure, which corresponds to a defect in the memory chips on the circuit board. In other cases, it may also signal a ground short circuit in a sensor’s electrical circuit.

When this error occurs, it generally means that the control unit fails its self-tests and, for safety reasons, deactivates the entire airbag system. The cause is usually a physical defect on the circuit board that prevents proper data processing. As a result, the control unit can no longer guarantee its safety‑related functions, causing the airbag warning light to remain constantly illuminated.

This error code often appears alongside B1497, which also indicates an internal hardware fault within the control unit’s chip. The simultaneous occurrence of these codes strongly suggests a defect in the central control unit itself, rather than merely a peripheral issue with wiring or sensors.

How do you recognize error B1498?

The most obvious symptom of error B1498 is the permanently lit airbag warning light on the instrument cluster. Additionally, when reading the fault memory, code B1498 will be displayed, often in combination with the related error B1497, further confirming an internal hardware fault.

The airbag warning light does not turn off after starting the vehicle. This is a clear indication that the safety system (SRS) is not operational and would fail to deploy the airbags in the event of a crash.

A professional diagnostic tool is required to read the fault memory of the airbag control unit. The stored code B1498 confirms the suspicion and guides further troubleshooting and repair.

What causes B1498?

The primary cause of error code B1498 is an internal hardware fault in the airbag control unit, specifically a defect in the ROM or RAM memory. Other possible causes include a ground short circuit in a sensor’s electrical circuit, damaged wiring, or, more rarely, software issues within the control unit.

A ROM/RAM fault is a physical defect in the memory chips on the control unit’s circuit board. Such defects can arise from aging, thermal stress, or voltage fluctuations, preventing the internal software from functioning correctly.

A ground short circuit in the so‑called cover‑rupture sensor is another specific cause. Here, the problem lies not in the control unit itself but in the peripheral components—namely, the wiring or the sensor.

General damage to wiring or defects in other sensors of the airbag system can also trigger secondary errors that lead to the storage of B1498. A thorough diagnosis is therefore essential to pinpoint the exact source of the fault.

In which vehicles does error B1498 occur?

Error code B1498 is primarily associated with Mitsubishi vehicles and appears across various models and series. Notably affected are the Pajero, Montero, Shogun, as well as the Town Box, spanning multiple generations.

At Airbag24, we specialize in repairing error code B1498 for a range of specific models, including:

Mitsubishi Pajero V80 (2007–2012) and V80 Facelift (2012–2021)

Mitsubishi Pajero V90 (2007–2012) and V90 Facelift (2012–2021)

Mitsubishi Montero V40

Mitsubishi Shogun V20 and Shogun V80

Mitsubishi Town Box U62W

How is error B1498 professionally repaired?

Professional repair of error B1498 focuses on restoring the removed airbag control unit at the component level. Internal hardware faults are corrected, the EEPROM memory is reset, and any stored crash data is erased. Following repair, the unit is typically ready for reinstallation without additional coding.

After sending the control unit to Airbag24, a detailed diagnosis is first performed to identify the precise cause of the hardware fault. Subsequently, repairs are carried out directly on the circuit board, including resetting the EEPROM memory to resolve the error state and restore default settings.

If crash data is stored in the control unit, it is completely and thoroughly erased during the repair process. This allows the original control unit to be reused, eliminating the need for an expensive replacement purchase.

Following successful repair, the control unit undergoes comprehensive final inspection and extensive testing to ensure flawless functionality. The refurbished unit can then be easily reinstalled in the vehicle (plug-and-play). All repairs come with 2 years' statutory liability for defects.