B1590 airbag control unit fault

What does error code B1590 indicate in the airbag control unit?

Error code B1590 signals a serious internal hardware defect in the airbag control unit, specifically in the Chevrolet Orlando. The cause is usually defective electronic components such as microprocessors or memory chips, not a software issue. The control unit cannot complete its self-test and enters a safety mode.

This internal fault prevents the control unit from performing its safety‑critical functions. It locks itself internally to avoid erroneous deployment or total failure in the event of an accident. As a direct consequence, the airbag warning light remains permanently illuminated.

Due to the hardware defect, this error cannot be cleared using conventional diagnostic tools. The fault remains stored in the error memory until the physical cause on the control unit’s circuit board is resolved through electronic repair.

How can you recognize error B1590?

The main symptom of error B1590 is a continuously lit airbag warning light on the instrument cluster. Additionally, it is typical that communication with the airbag control unit via diagnostic tools such as OBD or TECH2 is no longer possible. The error memory cannot be cleared, indicating permanent hardware damage.

The most obvious sign for the driver is the persistently illuminated airbag warning light. It does not turn off even after restarting the engine, signaling a critical, stored fault in the system.

In the workshop, the fault manifests as the control unit becoming unresponsive. Attempts to access the module via the diagnostic interface to read or clear error codes fail—the device is unreachable by the diagnostic system.

What causes error code B1590?

The primary cause of error B1590 is an internal hardware defect on the control unit’s circuit board, often affecting memory chips or microprocessors. Other triggers may include overvoltage, undervoltage, water damage leading to corrosion, or crash data stored after an accident that locks the module.

Electronic components age over time or can be damaged by voltage spikes in the vehicle’s electrical system. These issues result in internal malfunctions that are logged as error code B1590.

Following a collision, so‑called crash data is stored in the control unit. This data blocks normal operation and must be professionally erased during repair to deactivate the airbag warning light.

A similar error code, also indicating a comparable internal hardware defect in the Chevrolet Orlando, is code B2555.

Which vehicles are affected by B1590?

Error code B1590 occurs specifically in the airbag control unit of the Chevrolet Orlando. It primarily affects the first generation of the model, produced between 2010 and 2018. A commonly affected part number for this control unit is OEM number 13505823.

At Airbag24, we specialize in repairing error code B1590 for this specific model and have extensive experience addressing the unique hardware defects of this type of control unit.

Specific affected model:

Chevrolet Orlando, First Generation (2010–2018)

How is error B1590 professionally repaired?

Professional repair is a purely electronic process. Upon receipt, the control unit is opened and inspected on the circuit board. Defective components, such as memory chips, are desoldered and replaced. Any stored crash data is erased, and the device’s functionality is finally verified on a test bench.

After the removed control unit arrives at Airbag24, our technicians perform a detailed component‑level diagnosis. Using specialized measurement equipment, they pinpoint the exact source of the fault on the circuit board.

This is followed by precise electronic restoration, which includes replacing faulty microchips, capacitors, or other components with high‑quality new parts. If the fault was triggered by an accident, all crash data is completely deleted from the device’s memory.

Following repair, each control unit undergoes a comprehensive functional test to ensure flawless communication and proper self‑testing. We provide a 12‑month warranty on all repairs performed.

Is repair worthwhile for error code B1590?

Yes—repair is the most economical and technically sensible solution. It is significantly cheaper than purchasing a new part, which can cost over 300 euros. Moreover, when repairing the original component, there is often no need for time‑consuming re‑coding of the vehicle, saving both time and additional expenses.

The financial benefit is substantial. Compared to the high cost of a new control unit from the manufacturer, repair offers significant savings without compromising safety or functionality.

Another key advantage is that the repaired original control unit retains its vehicle-specific coding. As a result, it can typically be reinstalled without additional programming—a true plug-and-play solution.

Purchasing a used control unit raises safety concerns and is often legally prohibited. In contrast, professional repair with a 12-month warranty reliably restores full functionality to the safety-critical airbag system.