Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
That’s not the kind of message any driver wants to see, and for Mr L, finding it on his Audi A1’s dashboard was a genuine concern.
A red SOS light had appeared in the roof console, making it clear that one of the vehicle’s built-in safety systems had stopped functioning properly.
Regardless of what you drive, an emergency call warning needs to be dealt with.
This is the system designed to automatically place an emergency call following a serious collision. If it fails, you’re left without a layer of protection you’ve likely taken for granted until now.
Wanting a clear answer, Mr L took his Audi A1 to Protech Automotive, Newport, for a thorough investigation.
Below, you’ll discover how our Audi specialists traced the fault, what our testing uncovered, and how the Audi SOS system was restored to full working order.
How Protech Automotive Assessed the Audi SOS System B105413 Fault
Once Mr L arrived at Protech Automotive, Newport, our Audi specialists started by listening to his account.
Taking the time to understand what a customer has experienced is how every investigation begins at our garage, ensuring the process is directed accurately from the very first step. Mr L explained that an emergency call fault message had appeared on his dashboard and that the SOS light in the roof console had turned red.
There were no other faults with the vehicle, no recent repairs, and no obvious trigger for the warning.
With that picture clear, our Audi technicians began the first round of checks.
Our initial checks covered:
- A full visual inspection looking for any apparent signs of damage.
- A system scan to retrieve any stored or present fault codes.
Our Audi specialists found nothing out of the ordinary during the visual inspection. All components were in good condition with no damage visible. Once the visual review was complete, our team moved on to the system scan.
The system scan was performed using Audi manufacturer-level technology, and live data from the relevant control modules was examined at the same time.
A single fault code was recorded:
- B105413, GPS Antenna, open circuit, with an active/static status.
What Is Behind the B105413 Fault Code?
The B105413 fault code is set when the telematics control module in the vehicle identifies an open circuit in the GPS antenna circuit. This antenna delivers the location data that Audi’s emergency call system uses to determine the vehicle’s position when an automatic emergency call is triggered.
If the system cannot receive a valid GPS signal, the SOS function may be partially available, with a warning message displayed on the dashboard.
This confirmed for our team that the vehicle’s telematics control module had registered an open circuit in the GPS antenna signal path.
On its own, though, a fault code only tells you where the problem lies, not why it’s there.
A B105413 GPS antenna fault of this kind could originate from water ingress, a faulty connection, the antenna itself, or the coaxial cabling. To uncover the actual cause of the Audi SOS fault and resolve it correctly, the investigation needed to continue.
Identifying What Caused the B105413 GPS Antenna Fault
Once the B105413 GPS antenna fault had been confirmed, the priority shifted to understanding its cause.
A fault code narrows down the area of concern, but uncovering the actual cause requires careful, methodical testing.
Our expert Audi technicians began 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 as the main dealerships. This covers wiring diagrams, current flow diagrams, component specifications, and any technical service bulletins associated with the Audi SOS system B105413 fault.
Based on this research, our Audi specialists assembled a structured test plan:
- Inspect all connections within the circuit for evidence of poor contact or corrosion.
- Remove the roof antenna module and examine it for signs of water intrusion or physical damage.
- Carry out continuity and correct signal path testing on the coaxial cable and wiring between the GPS antenna and the emergency call module.
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. Every result fell within specification, confirming that the cabling and connectors were not at fault.
The investigation then progressed to the roof antenna module itself.
When our Audi experts removed the shark fin antenna and inspected it in detail, they confirmed that the GPS antenna element housed inside the module had failed, which accounted for the open circuit flagged by the B105413 fault code.
It was this internal failure that had triggered the emergency call system warning. With the Audi GPS antenna element no longer able to deliver a valid GPS signal to the telematics module, the SOS function had been reported as only partially available.
How Was the Audi B105413 Fault Fix Carried Out?
Once the root cause of the Audi SOS system B105413 fault had been confirmed, our Audi specialists contacted Mr L to talk him through the findings. We explained that the GPS antenna housed within the roof-mounted shark fin module had failed internally, and that this was what had triggered the warning.
At Protech Automotive in Newport, no repair proceeds without your full understanding and approval. Mr L was satisfied with the explanation and authorised our Audi technicians to move forward with the repair.
With the green light from Mr L, our team 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 compromise the new component.
- Every electrical connection was verified to ensure it was secure and properly seated.
- A replacement roof antenna module was fitted, restoring the GPS antenna circuit used by the emergency call system.
Once the new module was securely in place, the Audi emergency call system repair was ready to be verified.
Verifying the Audi A1 SOS System Was Fully Operational
With the new module in place, our Audi specialists performed a detailed series of checks to ensure the Audi SOS fault fix had been carried out successfully and that the emergency call system was operating as intended by the manufacturer.
Our team ran through the following confirmation steps:
- Cleared the stored B105413 fault code using manufacturer-level equipment.
- Ran a full system scan to verify that no further fault codes had been logged.
- Confirmed that the SOS indicator in the roof console had returned to its normal state.
- Verified that the emergency call function reported normal operation with no active warnings.
All checks returned the expected results. The GPS antenna circuit tested correctly, the emergency call system was fully operational once more, and no additional faults were present.
Using a careful, methodical approach, our team identified the precise cause of the Audi SOS system B105413 fault without unnecessarily replacing any parts.
The entire fault was investigated, tested, and put right during a single visit.
Once our expert Audi technicians had verified the Audi emergency call system repair was successful, they got in touch with Mr L to let him know that his Audi A1 was ready for collection.
Mr L was impressed by the standard of the repair, the transparent communication he’d received throughout, and the efficient turnaround, all at a better value than a main dealer.
Emergency Call System Fault on Your Audi? Let Protech Automotive Help
Has your Audi displayed a red SOS indicator or an emergency call warning on the dashboard?
Having the issue assessed sooner rather than later gives you the best chance of knowing your vehicle’s safety systems are fully operational when it matters most.
Emergency call faults can stem from several causes, including antenna failures, wiring problems, and module faults. Without the right equipment and a methodical approach to testing, there’s a real risk of misdiagnosis or unnecessary part replacement.
At Protech Automotive, Newport, 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 resolve them accurately the first time.
Here is why Audi drivers across Newport and Cardiff trust our team:
- 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.
- Audi specialists with access to manufacturer-level technology and official technical data.
Join the {{review-count}} customers who have rated us {{average-rating}} stars on Google for accurate repairs, expert knowledge and outstanding value.
If your Audi has an SOS warning or you suspect an emergency call system fault, call Protech Automotive, Newport, today on 01633 213713 to book your inspection.
