Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
For Mrs E, this wasn’t the kind of message she expected to see when she started her Audi A1.
The SOS indicator in the roof lining had turned red, and the vehicle was clearly telling her that a key safety feature had stopped working correctly.
An emergency call system warning isn’t something any driver should sit on.
It’s the system designed to automatically place an emergency call in the event of a serious collision. Once it goes down, you’re left without a layer of protection you probably never thought twice about.
Unwilling to take any chances, Mrs E brought her Audi A1 to Fergies, Thatcham, to have the fault properly investigated.
Inside this blog, you’ll uncover how our Audi specialists tracked down the fault, what our testing uncovered, and how the Audi SOS system was restored to full working order.
The First Steps in Diagnosing the Audi SOS System B105413 Fault
When Mrs E brought her Audi A1 to Fergies, Thatcham, our Audi specialists began by listening to what she’d experienced. At our garage, understanding the customer’s account first-hand is a key part of every investigation, allowing us to direct the process accurately from the start.
Mrs E explained that her dashboard had displayed an emergency call system warning, and that the SOS light in the roof console had turned red.
There had been no previous issues with the car, no work recently carried out, and nothing that might explain why the warning had appeared.
With her account noted, our Audi technicians set about the initial checks.
These first checks involved:
- A detailed visual inspection for any apparent signs of damage.
- A system scan to identify any stored or active fault codes.
Our Audi specialists found nothing of concern during the visual inspection. All components appeared undamaged and in their correct positions. After the visual check, our team moved on to the system scan.
The system scan was carried out using Audi manufacturer-level technology, and live data from the relevant control modules was examined at the same time.
A single fault code was present:
- B105413, GPS Antenna, open circuit, with an active/static status.
What Does the B105413 Fault Code Mean?
A B105413 fault code is recorded when the telematics control module identifies that the GPS antenna circuit has an open circuit. This antenna is what provides the location data that Audi’s emergency call system uses to pinpoint the vehicle’s position should an automatic emergency call be made.
If the system doesn’t receive a valid GPS signal, the SOS function may be partially available, with a warning message displayed on the dashboard.
This indicated that the vehicle’s telematics control module had detected an open circuit in the GPS antenna signal path.
But a fault code by itself only highlights where the problem sits, not why it occurred.
A B105413 GPS antenna fault of this kind could trace back to the antenna, the coaxial cabling, a connection problem, or water ingress. Identifying the actual cause of the Audi SOS fault and resolving it correctly called for further investigation.
Uncovering What Caused the B105413 GPS Antenna Fault
Once the B105413 GPS antenna fault was established, our priority turned to determining what had caused it in the first place.
A fault code tells you where to look, but working out the actual cause calls for systematic testing and investigation.
Our expert Audi technicians began by accessing 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 that the main dealerships use, from wiring diagrams and current flow diagrams to component specifications and any technical service bulletins connected to the Audi SOS system B105413 fault.
Based on this research, our Audi specialists formulated a structured test plan:
- Carry out continuity and correct signal path testing on the coaxial cable and wiring linking the GPS antenna to the emergency call module.
- Check all connections along the circuit for signs of poor contact or corrosion.
- Remove the roof antenna module and inspect it for evidence 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 carried out first. Every measurement came back within specification, confirming that the cabling and connectors were not at fault.
Our Audi experts then focused on the roof antenna module itself. Upon removing the shark fin antenna and carrying out a detailed inspection, they established that the GPS antenna element inside the module had failed, resulting in the open circuit identified by the B105413 fault code.
This internal component failure explained why the emergency call system had generated the warning. Because the GPS antenna element was no longer delivering a valid GPS signal to the telematics module, the SOS function had been reporting as only partially available.
Repairing the Audi SOS System: How the B105413 Fault Was Resolved
Having confirmed the root cause, our Audi experts contacted Mrs E to explain what had been discovered.
We outlined how the GPS antenna inside the roof-mounted shark fin module had failed internally, and why this had caused the Audi SOS system B105413 warning to appear.
At Fergies, Thatcham, no repair work begins until you fully understand the fault and give your approval to proceed. Mrs E was confident in the findings and gave our Audi specialists the green light to proceed with the repair.
Our Audi technicians then carried out the Audi B105413 fault fix:
- The failed roof antenna module was removed carefully, and the mounting area was checked for any signs of water damage or deterioration that could compromise the new part.
- A replacement roof antenna module was fitted, restoring the GPS antenna circuit used by the emergency call system.
- All electrical connections were verified to confirm they were secure and seated correctly.
With the new module fitted and connected, the Audi emergency call system repair was ready for its final checks.
Verification: Ensuring the Audi A1 SOS System Was Fully Restored
With the new module in place, our Audi technicians ran a full series of checks to ensure the Audi SOS fault fix had been carried out successfully and that the emergency call system was working as intended by the manufacturer.
Our Audi specialists performed the following steps:
- Cleared the stored B105413 fault code using manufacturer-level equipment.
- Verified 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.
- Ran a complete system scan to confirm that no further fault codes had been recorded.
Each repair verification check returned the expected outcome…
The Audi GPS antenna circuit tested correctly, full emergency call system function was confirmed, and no other faults were present.
Through careful, structured investigation, our team established the exact cause of the Audi SOS system B105413 fault without any unnecessary part replacements.
The entire fault was investigated, tested, and put right in a single visit.
Once our Audi experts had confirmed the Audi emergency call system repair was successful, they called Mrs E to let her know that her Audi A1 was ready for collection.
Mrs E was impressed by the quality of the work, the honest communication she’d received at every stage, and the efficient turnaround, all at a better value than a main dealer.
Emergency Call Fault on Your Audi? Speak to the Specialists at Fergies
Is your Audi flagging an SOS warning or showing a red light in the roof console?
Having the Audi SOS fault assessed promptly is the most effective way to confirm your vehicle’s safety systems are functioning when you need them.
Emergency call faults can stem from several sources, including antenna failures, wiring problems, and module faults. Without structured testing with the correct equipment, the risk of misdiagnosis or unnecessary part replacement increases.
At Fergies, Thatcham, 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 put them right the first time.
Here is why Audi drivers across Thatcham, Newbury and Reading trust our team:
- Award-winning garage, recognised as Top Garage 2021, with a Top Technician 2018 on the team.
- A courtesy car is available to keep you mobile while your vehicle is being repaired.
- 12 months parts and labour guarantee on all completed work.
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 Fergies, Thatcham, today on 01635 778002 to book your inspection.
