Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
That’s the message Mr F found on the dashboard of his Audi A1, and it immediately got his attention.
A red SOS light had appeared in the roof console, signalling that one of the vehicle’s built-in safety systems wasn’t functioning as it should.
No matter what vehicle you drive, an emergency call fault is something that needs attention straight away.
This is the system designed to automatically place an emergency call after a serious collision. When it’s no longer working, a safety feature you’ve likely never had reason to think about is suddenly unavailable.
Looking for a clear explanation, Mr F took his Audi A1 to Fitch Autos, Brownhills, to have the problem assessed by our Audi specialists.
Inside this blog, you’ll uncover how our team diagnosed the fault, what the root cause turned out to be, and how the Audi SOS system was repaired.
Our Audi Specialists’ Initial Assessment of the B105413 SOS Fault
When Mr F arrived at Fitch Autos, Brownhills, our Audi specialists began by listening to what he had to say.
Every investigation at our garage starts with the customer’s experience, because understanding exactly what’s happened helps our team target the right areas from the very beginning. Mr F told us that a fault message had appeared on the dashboard and that the SOS indicator on the roof console had turned red.
His vehicle hadn’t shown any other problems, no work had been done recently, and there was no obvious explanation for the fault.
With that picture clear, our Audi technicians started the first stage of checks.
Our opening checks included:
- A full visual inspection to look for any evident signs of damage.
- A system scan to check for any stored or current fault codes.
Nothing unusual was found during the visual inspection. All components were visually intact, with no apparent damage. After the visual review, our specialists moved on to the system scan.
The system scan was run using Audi manufacturer-level technology, while live data from the relevant control modules was reviewed in parallel.
The scan highlighted one fault code:
- B105413, GPS Antenna, open circuit, with an active/static status.
What Does the B105413 Fault Code Mean?
A B105413 code means the vehicle’s telematics control module has found an open circuit within the GPS antenna circuit. It’s this antenna that provides the location data Audi’s emergency call system needs to establish the vehicle’s position if an automatic emergency call takes place.
Should the system fail to receive a valid GPS signal, the SOS function may only operate partially, and a warning message will appear on the dashboard.
This made it clear that the vehicle’s telematics control module had registered an open circuit in the GPS antenna signal path.
A fault code, however, only points to the affected area. It doesn’t explain why the fault has occurred.
A B105413 GPS antenna fault could result from the antenna itself, the coaxial cabling, a faulty connection, or water ingress. Getting to the bottom of what had caused the Audi SOS fault and putting it right demanded further investigation.
What Caused the B105413 GPS Antenna Fault on This Audi A1?
With the B105413 GPS antenna fault now on record, the next task was to determine precisely what had caused it.
A fault code flags the problem area, but understanding why the fault occurred requires detailed, methodical testing.
Our Audi specialists began by referring to the manufacturer’s technical information service.
As your local independent Audi specialist, our team has access to the same technology and technical data as the main dealerships. This includes wiring diagrams, current flow diagrams, component specifications, and any technical service bulletins relating to the Audi SOS system B105413 fault.
From this research, our expert Audi technicians built a focused test plan:
- Remove the roof antenna module and examine it for any indication of water intrusion or physical damage.
- Carry out continuity and correct signal path testing on the coaxial cable and wiring running from the GPS antenna to the emergency call module.
- Inspect every connection in the circuit for signs of poor contact or corrosion.
The first phase of testing concentrated on continuity and resistance testing of the wiring between the emergency call module and the roof-mounted GPS antenna. All results were within specification, effectively ruling out a fault in the cabling or connectors.
Our attention then moved to the roof antenna module.
Once our Audi specialists removed the shark fin antenna and thoroughly inspected it, they confirmed that the GPS antenna element within the module had failed, which was responsible for the open circuit flagged by the B105413 fault code.
This failure within the component itself triggered the emergency call system warning.
The Audi’s GPS antenna element had lost the ability to provide a valid GPS signal to the telematics module, which explained why the SOS function had been flagged as only partially available.
How Did Our Team Complete the Audi B105413 Fault Fix?
Once our Audi specialists had confirmed the root cause of the fault, they contacted Mr F to go through the findings in detail.
We explained that the GPS antenna within the roof-mounted shark fin module had failed internally, and that this was directly responsible for the Audi SOS system B105413 warning.
At Fitch Autos, Brownhills, no work starts until you have a complete understanding of the problem and have given your approval. Mr F was pleased with the clarity of the explanation and gave our team the green light to carry out the repair.
Our expert Audi technicians then began the Audi B105413 fault fix:
- The faulty roof antenna module was carefully removed, and the mounting area was assessed for any signs of water damage or deterioration that could affect the replacement component.
- A new roof antenna module was fitted in place, restoring the GPS antenna circuit used by the emergency call system.
- Each electrical connection was checked to make sure it was secure and properly seated.
With the replacement module installed, the Audi emergency call system repair was ready for final confirmation.
Confirming That the Audi A1 Emergency Call System Was Fully Operational
Once the module replacement was complete, our Audi specialists conducted a detailed series of checks to ensure the Audi SOS fault fix was performed correctly and that the emergency call system was functioning as intended by the manufacturer.
Our team ran through the following verification steps:
- Checked that the SOS indicator in the roof console had returned to its normal state.
- Ran a full system scan to ensure that no additional fault codes had been stored.
- Verified that the emergency call function reported normal operation with no active warnings.
- Cleared the stored B105413 fault code using manufacturer-level equipment.
All checks confirmed the expected results. The GPS antenna circuit tested correctly, the emergency call system had been fully restored, and no other faults were identified.
Using a methodical, evidence-led approach, our team pinpointed the exact cause of the Audi SOS system B105413 fault without replacing any parts that didn’t need to be replaced.
The fault was fully investigated, tested, and resolved during a single visit.
Once our expert Audi technicians had confirmed the Audi emergency call system repair was complete, they contacted Mr F to let him know that his Audi A1 was ready for collection.
Mr F was pleased with the precision of the repair, the clear communication provided throughout the entire process, and the efficient turnaround. All while receiving better than dealer value.
Audi Emergency Call System Warning? Trust Fitch Autos to Find the Fault
Is your Audi showing an SOS warning light or an emergency call fault message on the dashboard?
Acting quickly gives you the best chance of confirming that your vehicle’s safety systems are in full working order.
Emergency call faults can originate from a variety of causes, whether that’s an antenna failure, a wiring fault, or a module issue. Without the right technology and a structured testing approach, it’s all too easy for the fault to be misidentified or for parts to be swapped out that weren’t the problem.
At Fitch Autos, Brownhills, our Audi specialists use manufacturer-level tools, official technical data, and hands-on experience to investigate faults like the Audi SOS system B105413 fault and repair them accurately the first time.
Here is why Audi drivers across Brownhills, Walsall and Cannock trust our team:
- 12 months parts and labour guarantee on all completed work.
- Audi specialists with access to manufacturer-level technology and official technical data.
- A courtesy vehicle is available so you’re not left without a vehicle during the repair.
Join the {{review-count}} local drivers who’ve 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 Fitch Autos, Brownhills, today on 01543 452630 to book your inspection.
