Emergency call function (eCall or SOS Call) in cars ŠKODA is a critical safety system that automatically notifies emergency services in the event of an accident or allows you to manually call for help. However, model owners Octavia, Kodiaq, Superb and others often encounter errors in its operation: a warning lights up on the instrument panel SOS inactive, the system does not respond to button presses, or the connection with the server is completely lost. What is the reason and how to fix it?

In this article we will look at all possible causes of the malfunction - from the banal absence of a SIM card to serious problems with the unit TCU (telematic module), and also give step-by-step diagnostic and repair instructions. We will pay special attention to models with the system ŠKODA Connect, where the SOS error is often due to software glitches. If you see a message on the display Emergency call function error — don’t panic: in 80% of cases the problem can be fixed on your own.

1. How the ŠKODA emergency call system works

Before troubleshooting, it is important to understand how the system works eCall/SOS in your car. In modern ŠKODA (starting from Octavia III 2013 and newer) is responsible for this:

  • 📡 Telematics block TCU — the “brain” of the system, which processes shock sensor signals, GPS coordinates and communication with the server.
  • 📱 SIM card — built-in or removable (depending on the model), provides data transfer over a mobile network.
  • 🚨 SOS button - usually located on the ceiling above the rearview mirror or on the center console.
  • 📶 GPS and GSM antennas - can be combined or separated (in Kodiaq and Superb often separate antennas are used).

In the event of an accident, the system automatically sends data about the location, direction of travel and impact severity to the call center ŠKODA (or local emergency services, depending on region). If the error occurs for no apparent reason, first check SIM card status and network coverage - This is the most common cause of failures.

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In models ŠKODA 2020+ SIM card for SOS built into the unit TCU and does not require replacement. In older versions (before 2018), the card may be removable - it must be periodically checked for functionality.

2. Main reasons for SOS call error

Error Emergency call function is inactive may appear for various reasons. We have collected TOP-7 most common problemsproblems that owners face ŠKODA:

Reason Symptoms Models where it occurs most often
The SIM card is missing or has expired Message SIM card not found or No network Octavia III, Superb II (until 2018)
Unit firmware failure TCU The system turns on, but cannot connect to the server Kodiaq, Karoq (2017–2020)
Damage to the GPS/GSM antenna No network signal or position determination Yeti, Rapid (after an accident)
Power or CAN bus interruption The error appears after electrical work All models with system ŠKODA Connect
Blocked by the server (subscription period has expired) Message Service not available Enyaq, Scala (after 5 years of operation)

The error occurs especially often after battery replacement, firmware updates or body repair (for example, after painting the roof where the antennas go). If the problem appears suddenly, start by checking fuses and TCU connections.

📊 What SOS error are you encountering?
  • SIM card not found
  • No connection to the server
  • The system does not respond to the button
  • Another problem

3. Diagnostics of malfunction: where to start

Before going to the service center, complete self-diagnosis. This will save time and money, since in 60% of cases the problem is solved without the intervention of specialists.

☑️ Initial check of the SOS system

Done: 0 / 4

If the SOS button does not respond and the display shows an error, follow these steps:

  1. Reboot the system: Turn off the ignition, open the driver's door and wait 2-3 minutes. Then turn the ignition on again. In 30% of cases this resets temporary glitches.
  2. Check your SIM card:
    • 🔍 In models before 2018, the map can be removable - it is located behind the glove compartment or under the center console.
    • 📅 Make sure the card has not expired (usually 5-10 years).
    • 📶 Check if the card supports 2G/3G networks (newer models may require 4G).
  • Diagnostics via VCDS or ODB2: If you have a diagnostic scanner, check the unit 5F (Infotainment) or 75 (Telematics) for errors. Codes U111300 or B101B indicate communication problems.

    • Critical information: in models ŠKODA Enyaq and Octavia IV block TCU integrated with the system MEB (modular platform). Replacing the SIM card yourself is not possible here; flashing is required in the service.

    4. The most common errors and their elimination

    Let's sort it out specific errors, which are displayed, and how to correct them.

    Error: SIM card not found or No SIM

    Reasons:

    • 🔌 Physical absence of the card (fell out, not inserted).
    • 💥 Damage to SIM slot contacts.
    • 📵 The card is blocked by the operator (the term has expired or the tariff has not been paid).

    Solution:

    1. Remove and reinstall the SIM card (pre-2018 models).
    2. Check the slot contacts for oxidation - clean with alcohol.
    3. If the card is built-in (new models), diagnostics at the service center is required.

    Error: No network or Weak signal

    Reasons:

    • 📡 Problems with the GSM antenna (cable break, damage after an accident).
    • 🏙️ The car is outside the coverage area (for example, in an underground parking lot).
    • 🔋 Low voltage in the on-board network (battery is discharged).

    Solution:

    1. Check the network signal strength on your phone - if there is no signal, the problem is not in the car.
    2. Measure the battery voltage (must be at least 12.4 V).
    3. Visually inspect the roof antenna (often damaged by high pressure washing).

    What to do if the antenna is damaged?

    If the antenna GSM/GPS physically damaged (for example, after an accident), it must be replaced. In models ŠKODA the antenna is often combined with the module Shark Fin (fin on the roof). The cost of replacement is from 8,000 to 15,000 rubles, depending on the model. Self-repair is not recommended as system calibration is required.

    Error: Service not available or Activation error

    This error often appears after reset settings or block replacement TCU. Reasons:

    • 🔄 The car has not been linked to the server ŠKODA Connect.
    • 📅 The subscription period has expired (in some countries the service is paid).
    • 🔧 Block TCU not customized for yours VIN.

    Solution:

    1. Try reactivating the service through the menu Infotainment → ŠKODA Connect → SOS activation.
    2. If activation fails, contact your dealer; you may need to re-register the vehicle in the system.

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    If after replacing the battery or resetting the settings, the SOS system stops working, first perform block reset TCU through a diagnostic scanner. This will restore communication with the server in 90% of cases.

    5. Repair and replacement of components: when to go to service

    If self-diagnosis does not help, most likely the problem is more serious. Let's consider cases when specialist intervention required:

    • 🔧 Unit fault TCU - if errors are detected after diagnostics U112100 (no connection with the block) or B1000 (internal error).
    • 📡 Damage to the antenna module — after an accident or contact corrosion.
    • 🔌 Broken wiring - power wires are most often affected +12V and CAN buses.
    • 💻 Firmware failure - if the block TCU "stuck" and does not respond to commands.

    The cost of repairs in the official service ŠKODA:

    Type of work Cost (rubles) Lead Time
    SOS system diagnostics 1 500 – 2 500 30–60 minutes
    Replacing a SIM card (in a removable slot) 500 – 1 200 15–30 minutes
    Antenna repair/replacement Shark Fin 8 000 – 15 000 2–3 hours
    Reflashing the block TCU 3 000 – 5 000 1–2 hours
    Replacing the block TCU (new) 25 000 – 40 000 3–4 hours

    ⚠️ Attention: When replacing a unit TCU it is definitely required linking to a vehicle by VIN. Without this, the SOS system will not work, even if the unit is working properly. This procedure can only be performed by authorized dealers ŠKODA.

    If you decide not to have your repairs done at a dealer, choose a service that has experience working specifically with ŠKODA. For example, in blocks TCU models Octavia IV and Superb III Unique firmware is used, which cannot be flashed with universal equipment.

    6. Prevention: how to avoid problems with SOS calls

    To keep your emergency call system running smoothly, follow these guidelines:

    • 🔄 Check your connection regularly: Press the SOS button every 3-6 months to make sure the system is responding.
    • 🚗 Avoid high pressure washing in the antenna area Shark Fin - this can damage the seals and contacts.
    • 🔋 Monitor the on-board voltage: Battery low (11.8 V) can lead to failures TCU.
    • 📱 Don't ignore firmware updates: New versions often fix server communication errors.

    ⚠️ Attention: If you are planning disconnect the battery (for example, for long-term parking), pre- deactivate the SOS system via menu Infotainment → ŠKODA Connect → SOS settings. This will prevent failures when power is reconnected.

    In models Enyaq and Scala with the system ŠKODA Connect 2.0 It is recommended to do it once a year resetting telematics settings through a diagnostic scanner. This clears the cache and restores stable communication with the server.

    Frequently asked questions (FAQ)

    Is it possible to drive with the SOS system not working?

    Technically yes, but this violates security requirements. In the EU and Russia, cars with a faulty system eCall may not pass inspection. In addition, in the event of an accident, you are deprived of automatic notification of emergency services.

    How much does it cost to replace a SIM card in SOS?

    If the card is removable (models before 2018), replacing it will cost 500–1 200 ₽. In new cars the card is soldered into the block TCU, and its replacement requires flashing (from 3 000 ₽).

    Why did the SOS button stop working after replacing the battery?

    When the power is turned off, the unit TCU can reset communication settings with the server. Solution:

    1. Start the car and wait 5-10 minutes (the system should reconnect automatically).
    2. If this does not help, perform a reset via diagnostics (Block 75 → Adaptation → TCU reset).

    Is it possible to disable the SOS system if it is disturbing?

    Physically turn off the system it's impossible - this contradicts the legislation of the EU and the Russian Federation. However, you can deactivate automatic call in case of an accident (but the manual call will remain active). To do this, contact the service ŠKODA.

    Where is the TCU located in my ŠKODA?

    Location depends on model:

    • Octavia III, Superb II: behind the glove compartment, on the right.
    • Kodiaq, Karoq: under the center console, next to the block Infotainment.
    • Enyaq: integrated into the control unit MEB (access only in the service).