B0058 - 00 airbag control unit fault

What does error code B0058 00 mean?

The error code B0058 00 indicates a specific issue in the passenger-side seatbelt pretensioner circuit. Technically, this code points to either excessively high voltage (High Circuit Voltage) or a resistance value outside the allowable range in the pretensioner’s ignition circuit, which prevents activation during an emergency.

Specifically, the fault refers to “Right-hand Front Seat Belt Pretensioner High Circuit Voltage (12 Volt VSS)” or a fault in the “Deployment Circuit – Circuit Resistance Out Of Range.” The airbag control unit continuously monitors the electrical parameters of all pyrotechnic components to ensure proper functionality.

If the control unit detects that the voltage in the passenger-side seatbelt pretensioner circuit exceeds the specified threshold or the resistance falls outside the tolerance range, it stores error code B0058 00. For safety reasons, the affected component—and often the entire associated system—is deactivated to prevent unintended deployment.

How can you recognize error code B0058 00?

The primary symptom of error code B0058 00 is a permanently illuminated airbag warning light on the instrument panel. This actively signals a malfunction in the restraint system, disabling the airbag and the affected seatbelt pretensioner until the fault is resolved.

The airbag warning light does not extinguish as usual after starting the vehicle but remains constantly lit. This is a clear indication that the control unit has detected a safety‑critical fault requiring intervention.

As a result of this malfunction, the protective function of the passenger‑side airbag system and the seatbelt pretensioner is no longer guaranteed. In the event of a crash, the passenger‑side pretensioner would fail to deploy, significantly increasing the risk of injury for the occupant.

What causes error code B0058 00?

The main causes of error code B0058 00 are physical defects in the wiring of the passenger‑side seatbelt pretensioner. These include cable breaks, corroded or loose connectors—especially beneath the seat—as well as damage to the coil spring. Moisture ingress into the control unit itself or stored crash data can also trigger this error.

One of the most common sources of failure is mechanical damage to cables and connectors. Frequent adjustments of the passenger seat can lead to cable breakage or loose connections under the seat. A thorough visual inspection and contact check is therefore an essential first step.

A defective coil spring in the steering column module can also cause voltage issues throughout the airbag system, manifesting secondarily as this error code—even though the root cause lies elsewhere.

Another critical factor is moisture damage. Water ingress, for example due to body panel leaks, can create short circuits in the airbag control unit and result in implausible voltage readings in the seatbelt pretensioner circuit.

Finally, crash data stored in the control unit’s internal memory after an accident can lock up the system. Even if all external components have already been replaced, the error persists until this data is professionally erased and the memory unit reset.

Which vehicles are affected by B0058 00?

Error code B0058 00 occurs specifically in certain vehicle models. Notably, this fault is well known in the first generation of the Chevrolet City Express. At Airbag24, we offer professional repair services for the airbag control unit of this model to restore full functionality.

At Airbag24, we repair airbag control units displaying error code B0058 00 for the following model:

Chevrolet: City Express, 1st Generation (model years 2009–2021)

How is error code B0058 00 professionally repaired?

Professional repair of error code B0058 00 involves precise diagnostics, repair of electronic components, and resetting the control unit. At Airbag24, after receiving the unit, we thoroughly inspect its internal circuits, erase crash data, and then reprogram the device to ensure full functionality.

The repair process follows a proven, standardized procedure to guarantee the highest quality and safety. First, before removing the control unit, a workshop should conduct a comprehensive diagnosis of the vehicle to definitively rule out external causes such as cable breaks.

After sending the removed airbag control unit to Airbag24, a detailed incoming inspection takes place in our specialized test environment. Here, all stored errors are precisely read out, and the root cause is analyzed down to the component level.

The actual repair focuses on addressing internal electronic faults. This includes professionally erasing stored crash data and resetting the memory unit. The control unit is then reprogrammed or restored to its factory settings.

Following successful refurbishment and final testing, the control unit is fully functional again and can typically be reinstalled in the vehicle without additional coding. We provide a 12-month warranty on all repairs.