E19
Audi
General Self-Test / Internal Diagnostics Failure
Audi wallbox displays E19 and the app reports ‘Internal self-test failed’ at startup; charging is disabled.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Faulty ADC or measurement circuitry on main board, Calibration data corruption, Multiple sensor failures (current, voltage, temperature), Partial main board failure after surge or overheating
How to Fix / Troubleshooting
Safety first: Do not attempt to bypass self-test protections; they are critical for safe operation.
- Full power reset: Turn off the breaker for at least 5 minutes, then restore power and observe the startup sequence. Note any additional codes or LED patterns.
- Check environment: Ensure the charger is within specified temperature and humidity limits; extreme conditions can affect sensor readings.
- Firmware reinstallation: If supported, perform a full firmware reflash via the official Audi service tool to restore calibration data.
- Professional diagnostics: A technician should connect to the service interface to read detailed diagnostic logs and identify which internal test failed (e.g., current sensor, voltage sensor, RCD test).
- Replace main board: In most cases of persistent E19, the main control board must be replaced as a unit.
Do not use the charger until the self-test passes successfully at startup.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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