01741-002 airbag control unit fault

What does error code 01741-002 mean?

Error code 01741-002 indicates a specific fault in the airbag system related to the passenger-side seatbelt pretensioner. The primary cause is typically electrical resistance deviations in the associated wiring harness or an internal fault within the airbag control unit. The system interprets this deviation as a “Load limiter error passenger side” and, for safety reasons, activates the airbag warning light.

Technically speaking, the airbag control unit continuously monitors the electrical resistance values of all safety‑critical components. The passenger‑side seatbelt pretensioner is connected to the control unit via its own circuit. If the measured resistance in this circuit deviates from the specified value—whether too high or too low—the system recognizes it as a fault and stores error code 01741-002 in the fault memory.

This error causes the control unit to switch into a safety mode. In an emergency, the functionality of the affected seatbelt pretensioner—and potentially other parts of the airbag system—may be compromised, making immediate diagnosis and repair essential.

How can you recognize error code 01741-002?

The primary and unmistakable symptom of error code 01741-002 is a permanently illuminated airbag warning light on the instrument panel. This light does not turn off even after starting the vehicle. Additionally, the error code remains stored in the airbag control unit’s fault memory and can be read out using an appropriate diagnostic tool.

The airbag warning light is the system’s direct signal to the driver that a malfunction exists and full protective functionality is no longer guaranteed. In most vehicles, the light stays on until the fault is resolved and the fault memory is cleared.

In rare cases, the error may appear only intermittently—for example, during vibrations or under certain temperature conditions—suggesting a loose connection or incipient corrosion at a connector. However, professional diagnostics are necessary in every situation.

What causes error 01741-002?

The main cause of error 01741-002 is electrical issues, particularly resistance deviations in the wiring harness leading to the passenger‑side seatbelt pretensioner. Other potential causes include damaged sensors, corroded connectors, or an internal defect within the airbag control unit. Following a crash, stored crash data can also lock the control unit and trigger this error.

Most commonly, damaged cables or connectors are the source of the problem. Vibrations, material aging, or mechanical stress can lead to cable breaks or corroded contacts, altering the electrical resistance of the circuit.

An internal defect within the airbag control unit itself is another possible cause. Electronic components on the circuit board—such as resistors, capacitors, or processors—can fail, preventing proper signal processing. Such defects require chip‑level repairs.

After a collision, airbag control units store so‑called crash data. These data can lock the unit and prevent further use, even if there are no visible damages. Clearing this crash data by a qualified service provider is essential to restore full functionality.

Which vehicles experience error 01741-002?

Error code 01741-002 occurs predominantly in specific Bentley models. Vehicles such as the first‑generation Bentley Azure and older Continental series models are particularly affected. At Airbag24, we have successfully diagnosed and repaired this error in the aforementioned vehicles.

At Airbag24, repairs for error 01741-002 have been documented for the following Bentley models:

Bentley Azure, 1st Generation (2006–2011)

Bentley Continental T, 1st Generation (1991–2002)

Bentley Continental Supersports Mk1

How is error 01741-002 professionally repaired?

Professional repair of error 01741-002 requires removal of the airbag control unit. After sending the unit to Airbag24, a precise diagnosis is performed, examining the electronics. Depending on the root cause, repairs may involve fixing the wiring harness, clearing crash data, or replacing defective components on the circuit board, followed by a final functional test.

The process at Airbag24 begins with the proper removal of the control unit from the vehicle, which is then shipped to us. It is crucial to disconnect the battery and observe all safety precautions before dismantling.

Upon receipt of the unit, a comprehensive analysis takes place. Our technicians inspect the control electronics, identify faulty chips or modules, and determine whether crash data has been stored. Resistance measurements and verification of the circuit traces are integral parts of this diagnostic process.

The actual repair involves desoldering and replacing damaged components, as well as properly clearing the crash data. This restores the control unit’s internal software to a fully functional state. It is strongly advised against using airbag simulators, as this compromises vehicle safety and may result in the loss of the vehicle’s operating permit.

Following successful repair and a final test, the control unit is returned. After reinstalling it in the vehicle, the fault memory typically needs to be cleared again. We provide 2 years' statutory liability for defects on all repairs.