B1345 airbag control unit fault

What does error code B1345 indicate?

Error code B1345 indicates a short circuit to ground in the input circuit of the airbag control unit. This points to a problem in the system’s peripheral components, such as faulty sensors or damaged wiring. In some cases, an internal defect in the electronic components of the control unit itself may also be the cause.

The control unit continuously monitors the electrical circuits of all connected components, such as impact sensors. A “short circuit to ground” means that an electrical signal, which should remain isolated, inadvertently finds a path to the vehicle chassis (ground).

This fault prevents the control unit from correctly interpreting sensor signals, thereby compromising the functionality of the entire safety system. As part of its self-diagnosis, the unit detects this anomaly, stores error code B1345, and activates the airbag warning light.

How can you recognize error code B1345?

The most obvious symptom of error code B1345 is the permanently illuminated airbag warning light on the instrument panel, which does not turn off even after starting the engine. This is a clear indication that the airbag system is not operational and may fail to deploy in the event of a crash.

The activated warning light is a direct result of the system’s internal diagnostics. The control unit has detected a critical fault and, for safety reasons, shuts down the system to prevent false activations.

Depending on the vehicle model, additional warning messages may appear on the onboard computer display. However, definitive confirmation that it is indeed error code B1345 can only be obtained by reading the fault memory using a professional diagnostic tool.

What causes error code B1345?

The primary causes of error code B1345 are physical defects in the system’s wiring or sensors. These include defective airbag sensors, damaged cable connections with a short circuit to ground, corrosion at connectors, or incorrect calibration. Less frequently, the issue stems from a hardware defect within the control unit itself.

A common source of failure is a defective airbag sensor, which can be damaged by mechanical impacts or develop an electrical fault due to internal aging.

Damaged cable connections are another typical cause. In particular, the spiral spring beneath the steering wheel is subjected to constant rotational stress and may eventually break or lose its insulation, leading to a short circuit.

In vehicles with three doors or models featuring frequently adjustable seats, connector contacts and cables under the seats can become damaged. Mechanical stress results in loose connections or broken wires.

Corrosion at electrical terminals—often caused by moisture ingress—is yet another potential source of trouble. Oxidation at contact points disrupts signal flow and can create an unintended path to ground.

In rarer cases, an internal defect on the control unit’s circuit board itself may trigger the error code, where an electronic component in the input circuit fails.

Which models experience error code B1345?

Error code B1345 has been documented for specific vehicle models from Dodge and Kia. Notably affected are the Dodge Challenger LC series, the second-generation Dodge Caravan, and the Kia Mohave HM series.

At Airbag24, we repair error code B1345 for the following models listed in our database:

Dodge: Challenger (LC), Caravan (2nd generation)

Kia: Mohave (HM, model years 2008–2024)

Since control units vary significantly across manufacturers and models, a model-specific approach to diagnosis and repair is crucial for success.

How is error code B1345 professionally repaired?

Professional repair begins with an analysis of the submitted control unit to pinpoint the exact cause of the short circuit. Defective components on the circuit board are then replaced, and damaged traces are repaired. We provide 2 years’ statutory liability for defects on successful repairs and final testing.

Once the removed control unit arrives at Airbag24, our technicians conduct a thorough initial inspection, analyzing the hardware to identify the precise source of the short circuit in the input circuit.

Restoration takes place directly at the component level. Faulty electronic parts, such as resistors or capacitors, are carefully desoldered and replaced with new, specification‑compliant components. Damaged traces on the circuit board are meticulously restored.

After hardware repair, the device’s fault memory is completely cleared. If any non-erasable crash data from a previous event remains stored, it will also be deleted, and the control unit will be restored to its factory settings.

A final functional test on the test bench ensures that fault B1345 has been permanently resolved and that the control unit is once again communicating and operating correctly. The repaired unit can then be reinstalled in the vehicle via plug-and-play.