Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
A message like that on your dashboard isn’t easy to ignore, and for Mrs C, seeing it flash up on her Audi A1 was a genuine cause for concern.
The SOS button in the roof console had turned red, a clear sign that one of her vehicle’s critical safety features was no longer operating as it should.
When your emergency call system flags a fault, it’s not something to set aside and deal with later.
It’s the system designed to automatically place an emergency call in the event of a serious collision. The moment it stops working, you lose a safety net you may never have considered until it’s no longer there.
Determined to get it resolved, Mrs C brought her Audi A1 to Cheltenham & Gloucester Autocentre, Cheltenham, for a thorough investigation.
Inside this blog, you’ll uncover how our Audi specialists identified the fault, what testing revealed, and how the Audi SOS system was fully restored.
How Our Team Assessed the Audi SOS System B105413 Fault
When Mrs C arrived at Cheltenham & Gloucester Autocentre, Cheltenham, our Audi specialists began by listening. Taking the time to hear exactly what a customer has experienced is a vital part of how we approach every investigation, ensuring we start on the right track from day one.
Mrs C described how an emergency call warning had appeared on the dashboard, along with a red SOS indicator in the roof console.
There had been no other faults with the vehicle, no recent work carried out, and no clear reason for the warning to appear.
Armed with that understanding, our Audi technicians moved on to the opening round of checks.
Our first checks included:
- A thorough visual inspection looking for any obvious signs of damage.
- A system scan to pick up any stored or active fault codes.
The visual inspection didn’t reveal anything out of the ordinary. All visible components were intact, with no signs of damage or disturbance. With that stage complete, our specialists turned to the system scan.
The system scan was performed using Audi manufacturer-level technology, with live data from the relevant control modules assessed alongside the scan results.
The scan returned a single fault code:
- B105413, GPS Antenna, open circuit, with an active/static status.
What Does the B105413 Fault Code Mean?
The B105413 code is stored when the vehicle’s telematics control module registers an open circuit in the GPS antenna circuit. The antenna supplies location data to Audi’s emergency call system, enabling it to identify the vehicle’s position in the event of an automatic emergency call.
If a valid GPS signal cannot be received, the SOS function may become only partially operational, prompting a warning message to appear on the dashboard.
This result indicated that the vehicle’s telematics control module had detected an open circuit in the GPS antenna signal path.
On its own, however, a fault code doesn’t tell you what caused the problem.
A B105413 GPS antenna fault can have several possible origins, from the antenna itself to the coaxial cabling, a connector issue, or water ingress. Establishing the true cause of the Audi SOS fault and repairing it correctly required further investigation.
Tracing the Root Cause of the B105413 GPS Antenna Fault
With the B105413 GPS antenna fault confirmed, the next step was to determine exactly what was causing it.
A fault code highlights the affected area, but identifying the root cause requires structured investigation and focused testing.
Our Audi technicians began by consulting the manufacturer’s technical information service.
As your local independent Audi specialist, our team has access to the same level of technology and technical data used by the main dealerships, including wiring diagrams, current flow diagrams, component specifications, and any technical service bulletins associated with the Audi SOS system B105413 fault.
Drawing on this research, our Audi specialists developed a targeted test plan:
- Carry out continuity and correct signal path testing on the coaxial cable and wiring between the GPS antenna and the emergency call module.
- Inspect all connections along the circuit for signs of poor contact or corrosion.
- Remove the roof antenna module and check for any evidence of water intrusion or physical damage.
The initial testing stage centred on continuity and resistance testing of the wiring running between the emergency call module and the roof-mounted GPS antenna. All readings fell within specification, which eliminated a cable or connector fault.
From there, our Audi experts turned their attention to the roof antenna module. After removing the shark fin antenna and inspecting it closely, they found that the GPS antenna element within the module had failed, creating the open circuit flagged by the B105413 fault code.
This internal failure accounted for the emergency call system warning. The GPS antenna element could no longer provide a valid GPS signal to the telematics module, which explains why the SOS function was recorded as only partially available.
How Was the Audi B105413 Fault Fix Completed?
With the root cause now established, our Audi technicians contacted Mrs C to explain what the investigation had uncovered. We talked her through how the GPS antenna within the roof-mounted shark fin module had failed internally, triggering the Audi SOS system B105413 warning.
At Cheltenham & Gloucester Autocentre, Cheltenham, no work is carried out until you have a full understanding of the issue and have given your approval. Mrs C was satisfied with the findings and gave our team the go-ahead to proceed with the repair.
Our Audi specialists then completed the Audi B105413 fault fix:
- The failed roof antenna module was carefully removed, and the mounting area was inspected for any signs of water damage or deterioration that could affect the new component.
- A replacement roof antenna module was fitted, restoring the GPS antenna circuit used by the emergency call system.
- All electrical connections were checked to confirm they were secure and adequately seated.
With the new module in position, the Audi emergency call system repair was ready for the final stage of our repair process: verification.
Confirming the Audi SOS Fault Fix Was Complete
Once the replacement was fitted, our Audi technicians carried out a series of checks to confirm the Audi SOS fault fix was successful and that the emergency call system was functioning as intended by the manufacturer.
Our team completed the following confirmation steps:
- Ran a full system scan to verify that no additional fault codes had been stored.
- Cleared the stored B105413 fault code using manufacturer-level equipment.
- Confirmed that the emergency call function reported normal operation with no active warnings.
- Checked that the SOS indicator in the roof console had returned to its normal state.
Every check produced the expected result. The GPS antenna circuit tested correctly, the emergency call system was fully restored, and no further faults were present.
Using a structured, methodical approach, our team identified the precise cause of the B105413 GPS antenna fault without replacing any parts unnecessarily.
The fault was diagnosed, tested, and resolved within a single visit.
Once our Audi experts confirmed that the repair to the Audi emergency call system was successful, they contacted Mrs C to let her know that her Audi A1 was ready for collection.
Mrs C was delighted with the outcome, the transparent communication throughout, and the efficient turnaround, all at a better value compared to a main dealer.
Audi SOS Fault Warning? Book Your Inspection at Cheltenham & Gloucester Autocentre
Is your Audi showing a red SOS light or an emergency call system warning?
The sooner the fault is investigated, the sooner you can be confident your vehicle’s safety systems are working as they should.
Emergency call faults can arise from a range of causes, including antenna failures, wiring faults, and module issues. Without structured testing and the right equipment, it’s easy for the problem to be misdiagnosed or for parts to be replaced that didn’t need replacing.
At Cheltenham & Gloucester Autocentre, Cheltenham, 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 fix them accurately the first time.
Here is why Audi drivers across Cheltenham, Gloucester and the surrounding areas trust our experts:
- Award-winning garage, including Top Garage 2019 and Automechanika Garage of the Year.
- 12 months parts and labour guarantee on all completed work.
- A courtesy car is available to keep you on the road while your Audi is with us.
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 Cheltenham & Gloucester Autocentre, Cheltenham, today on 01452 855555 to book your inspection.
