Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
For Mr J, this wasn’t the kind of message he expected to find on the dashboard of his Audi A1.
The red SOS light in the roof console had come on, telling him that a critical safety system in his vehicle had stopped working as it should.
An emergency call warning is never something to leave and hope it goes away.
This is the system designed to automatically place an emergency call after a serious collision. Once it’s down, you’re missing a layer of protection you’ve most likely never had to think about.
Rather than leave it unresolved, Mr J brought his Audi A1 to Marc’s Garage, Lytham St Annes, to get the fault properly assessed.
Below, you’ll find out how our Audi specialists traced the cause of the fault, what was discovered during testing, and how the Audi SOS fault fix was completed.
How Marc’s Garage Began Investigating the Audi SOS System B105413 Warning
Once Mr J arrived at Marc’s Garage, Lytham St Annes, our Audi specialists started by listening.
At our garage, hearing the customer’s own account of the issue is the foundation of every investigation, giving our team the context needed to direct the process effectively from the outset.
Mr J told us that a fault message had appeared on his dashboard and that the SOS indicator in the roof console had turned red.
The vehicle hadn’t shown any other issues, there had been no recent work, and there was nothing obvious that could have triggered the fault.
With that detail gathered, our Audi technicians began the initial round of checks.
Our first checks included:
- A comprehensive visual inspection for any apparent signs of damage.
- A system scan to pick up any stored or present fault codes.
The visual inspection came back clear. All components appeared undamaged with nothing out of place. With the visual review finished, our specialists moved their attention to the system scan.
The system scan was run using Audi manufacturer-level technology, and live data from the relevant control modules was reviewed alongside the scan output.
The scan returned one fault code:
- B105413, GPS Antenna, open circuit, with an active/static status.
What Is the B105413 Fault Code?
A B105413 fault code is set when the telematics control module detects an open circuit in the GPS antenna circuit. This antenna delivers the location data Audi’s emergency call system requires to determine the vehicle’s position in the event of an automatic emergency call.
If the system cannot receive a valid GPS signal, the SOS function may be partially available, and a warning message will be displayed on the dashboard.
This confirmed for our team that the vehicle’s telematics control module had identified an open circuit in the GPS antenna signal path.
A fault code alone, however, doesn’t tell you why the fault has occurred.
A B105413 GPS antenna fault like this could be down to the antenna itself, the coaxial cabling, a connection problem, or water ingress. Identifying the true cause of the Audi SOS fault and fixing it properly called for further investigation.
Tracing What Caused the B105413 GPS Antenna Fault
Now that the B105413 GPS antenna fault had been confirmed, our team needed to determine exactly what had caused it.
A fault code highlights the problem area, but getting to the actual cause requires methodical investigation and targeted testing.
Our Audi specialists began by consulting 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.
Drawing on this research, our expert Audi technicians developed a clear test plan:
- Carry out continuity and correct signal path testing on the coaxial cable and wiring from the GPS antenna to the emergency call module.
- Inspect all connections across the circuit for signs of poor contact or corrosion.
- Remove the roof antenna module and assess it for any indication of water intrusion or physical damage.
Continuity and resistance testing on the wiring between the emergency call module and the roof-mounted GPS antenna was completed first. All measurements came back within specification, ruling out a fault in the cabling or connectors.
Our Audi specialists then shifted their focus to the roof antenna module.
Upon removing the shark fin antenna and conducting a detailed inspection, they established that the GPS antenna element within the module had failed, resulting in the open circuit recorded under the B105413 fault code.
This internal failure was directly responsible for the emergency call system warning. Because the GPS antenna element could no longer provide a valid GPS signal to the telematics module, the SOS function had been reported as only partially available.
How Our Audi Specialists Carried Out the B105413 Fault Fix
Once the root cause was clear, our Audi specialists got in touch with Mr J to explain what had been found. We talked him through how the GPS antenna inside the roof-mounted shark fin module had failed internally, and why this had triggered the Audi SOS system B105413 warning.
At Marc’s Garage, Lytham St Annes, no repair work starts until you have a complete understanding of the problem and have given your approval to proceed. Mr J was pleased with the clarity of the explanation and gave our team the go-ahead for the repair.
Our expert Audi technicians then began the Audi B105413 fault fix:
- The faulty roof antenna module was removed with care, and the mounting area was checked 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.
- Each electrical connection was inspected to confirm it was secure and properly seated.
With the replacement module securely installed, the Audi emergency call system repair was ready to be confirmed.
Confirming the Audi A1 SOS System Was Back to Full Working Order
With the replacement module in place, our Audi specialists conducted a series of checks to ensure the Audi SOS fault fix had been 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.
- Verified that the emergency call function reported normal operation with no active warnings.
- Ran a full system scan to ensure that no additional fault codes had been stored.
- Cleared the stored B105413 fault code using manufacturer-level equipment.
All checks confirmed that the repair had been successful.
The GPS antenna circuit tested correctly, the emergency call system had been fully restored, and no further faults were present.
Taking a methodical, evidence-led approach, our team identified the exact cause of the Audi SOS system B105413 fault without replacing any parts that didn’t need to be replaced.
The fault was investigated, tested, and resolved during a single visit.
Once our expert Audi technicians confirmed that the repair to the Audi emergency call system was successful, they called Mr J to let him know that his Audi A1 was ready for collection.
Mr J was pleased with the precision of the work, the clear and honest communication he’d received throughout, and the efficient turnaround, all at a better value compared to a main dealer.
SOS Fault on Your Audi? Let Marc’s Garage Find the Cause
Is your Audi displaying an emergency call system warning or a red SOS light on the dashboard?
Acting quickly is the most effective way to ensure your vehicle’s safety systems function when you need them most.
Emergency call faults can originate from a range of causes, including antenna failures, wiring issues, and module faults. Without structured testing using the correct equipment, it’s all too easy for the fault to be misidentified or for parts to be swapped out that weren’t the problem.
At Marc’s Garage, Lytham St Annes, 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 Lytham St Annes, Preston and Blackpool trust our team:
- 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.
- 12 months or 12,000 miles parts and labour guarantee on all completed work, whichever comes first.
Join the {{review-count}} local customers who have rated us {{average-rating}} stars on Google for accurate repairs, expert knowledge, and better-than-dealership value.
If your Audi has an SOS warning or you suspect an emergency call system fault, call Marc’s Garage, Lytham St Annes, today on 01253 738345 to book your inspection.
