Audi SOS System B105413

“Emergency call function fault. Function partially available. Please contact workshop.”

When Mr D read this message on the dashboard of his Audi A1, he knew something wasn’t right.

The red SOS indicator had lit up in the roof console, telling him that a safety system built into the vehicle was no longer fully operational.

Regardless of what you drive, an emergency call warning is never something to overlook.

This is the system designed to automatically place an emergency call following a serious collision. If it fails, a layer of protection you’ve probably taken for granted is suddenly gone.

Wanting answers, Mr D brought his Audi A1 to CSN Autos, Wymondham, looking for a clear diagnosis.

Throughout this blog, you’ll discover how our Audi specialists investigated the warning, what was causing it, and how the Audi SOS fault fix was carried out.

How CSN Autos Investigated the Audi SOS System B105413 Warning

Once Mr D arrived at CSN Autos, Wymondham, our Audi specialists started by listening carefully to his account. Hearing exactly what the customer has experienced is a crucial first step at our garage, making sure the investigation is focused in the right direction before any tools are picked up. 

Mr D told us that an emergency call fault message had appeared on his dashboard and that the SOS indicator in the roof console had gone red.

There were no other issues with the vehicle, no recent repairs, and nothing obvious that could have caused the fault.

With that detail in hand, our expert Audi technicians began the initial checks.

Our initial checks covered:

• A comprehensive visual inspection to spot any clear signs of damage.
• A system scan to capture any stored or present fault codes.

The visual inspection came back clear. Every component appeared to be in good order, with no visible damage. Once this part of the assessment was complete, our team moved on to the system scan.

The system scan was conducted using Audi manufacturer-level technology, and live data from the relevant control modules was reviewed as part of the process.

One fault code was recorded:

• B105413, GPS Antenna, open circuit, with an active/static status.

What Does the B105413 Fault Code Mean?

This fault code is logged when the telematics control module in the vehicle detects an open circuit affecting the GPS antenna. The GPS antenna feeds location data into Audi’s emergency call system, enabling the vehicle’s position to be determined if an automatic emergency call is initiated.

When the system cannot receive a valid GPS signal, the SOS function may be partially available, and a dashboard warning message will be displayed.

This confirmed for our team that the vehicle’s telematics control module had found an open circuit in the GPS antenna signal path.

A fault code alone identifies only the area of concern, not what caused it.

A B105413 GPS antenna fault like this could be down to the antenna, the coaxial cabling, a poor connection, or water ingress. To get to the true cause of the Audi SOS fault and fix it properly, a deeper investigation was required.

What Led to the B105413 GPS Antenna Fault on This Audi A1?

Now that the B105413 GPS antenna fault had been confirmed, the focus shifted to understanding what had actually caused it.

While a fault code narrows down the area of concern, identifying the true cause requires careful, structured testing.

Our expert Audi technicians started by reviewing the manufacturer’s technical information service.

As your local independent Audi specialist, our team has access to the same technology and technical data available to franchised dealerships, including wiring diagrams, current flow diagrams, component specifications, and any relevant technical service bulletins for the Audi SOS system B105413 fault.

With this information gathered, our Audi experts assembled a clear test plan:

1. Inspect all connections within the circuit for evidence of poor contact or corrosion.
2. Carry out continuity and correct signal path testing on the coaxial cable and wiring from the GPS antenna to the emergency call module.
3. Remove the roof antenna module and assess it for signs of water intrusion or physical damage.

Testing began with continuity and resistance checks on the wiring between the emergency call module and the roof-mounted GPS antenna. The results came back within specification, ruling out any cable or connector fault.

The investigation then progressed to the roof antenna module. 

When our Audi specialists removed the shark fin antenna and examined it in detail, they found that the GPS antenna element inside the module had failed, causing the open circuit recorded under the B105413 fault code.

It was this internal failure that had triggered the emergency call system warning. 

With the GPS antenna element no longer capable of providing a valid GPS signal to the telematics module, the SOS function was only partially available, leaving the system unable to reliably determine the vehicle’s location in the event of a collision.

How the Audi B105413 Fault Fix Was Carried Out

Once the root cause of the Audi SOS system B105413 fault was clear, our Audi specialists got in touch with Mr D to walk him through what we’d found.

We explained that the GPS antenna housed within the roof-mounted shark fin module had suffered an internal failure, which was what had triggered the Audi SOS system warning.

At CSN Autos, Wymondham, no repair goes ahead without your full understanding and approval. Mr D was happy with the explanation and authorised our Audi technicians to move forward with the repair.

Our team then proceeded with the Audi B105413 fault fix:

• The faulty roof antenna module was removed with care, and the mounting area was examined for any signs of water damage or deterioration that might affect the replacement.

• A new roof antenna module was installed, restoring the GPS antenna circuit used by the emergency call system.
• Every electrical connection was inspected to ensure it was secure and correctly seated.

Once the replacement module was securely in place, the Audi emergency call system repair was ready to be verified.

Was the Audi SOS Fault Fix Successful? 

With the replacement fitted, our Audi specialists performed a thorough series of checks to ensure the Audi SOS fault fix had been completed correctly and that the emergency call system was operating as intended by the manufacturer.

Our team carried out the following verification steps:

• Confirmed that the SOS indicator in the roof console had returned to its normal state.
• Cleared the stored B105413 fault code using manufacturer-level equipment.
• Ran a full system scan to check that no further fault codes had been logged.
• Verified that the emergency call function reported normal operation with no active warnings.

All checks returned the results we expected. 

The GPS antenna circuit tested correctly, the emergency call system was fully operational once more, and no additional faults were found.

By taking a structured, methodical approach, our team traced the exact cause of the Audi SOS system B105413 fault without unnecessarily replacing any parts.

Once our Audi technicians had verified that the Audi emergency call system repair was complete, they called Mr D to let him know that his Audi A1 was ready for collection.

Mr D was pleased with the quality of the work, the straightforward communication he’d received throughout the repair, and the efficient turnaround, all at a better value than a main dealer.

SOS Warning on Your Audi? Let CSN Autos Investigate

Has your Audi displayed a red SOS light or an emergency call system fault message?

Getting the issue checked early is the best way to make sure your vehicle’s safety systems are fully operational when it matters most.

Emergency call faults can be caused by several things, from antenna failures and wiring issues to module faults. Without the right equipment and a methodical testing approach, there’s a real risk of misdiagnosis or unnecessary part replacement.

At CSN Autos, Wymondham, our Audi specialists use manufacturer-level tools, official technical data, and hands-on experience to diagnose faults like the Audi SOS system B105413 fault and resolve them correctly the first time.

Here is why Audi drivers across Wymondham and Norwich trust our team:

• Multi-award-winning garage, including South Norfolk Small Business of the Year 2024 and Top Garage Finalist 2023 and 2024.
• 12 months parts and labour guarantee on all completed work.
• A courtesy car is available so you’re not left without transport while your vehicle is being repaired.

Join the {{review-count}} customers who have rated us {{average-rating}} stars on Google for accurate repairs, expert knowledge and great value.

If your Audi has an SOS warning or you suspect an emergency call system fault, call CSN Autos, Wymondham, today on 01953 425983 to book your inspection.

Call Now 01953 425983Save on Audi Servicing