This is general guidance based on U.S. Department of Energy AFDC. Actual charger behavior varies by manufacturer and firmware version. Always follow on-screen instructions and contact the charging network if you are unsure. If anything looks or feels unsafe, stop charging and move away from the charger.
You tried to start a session through the charging network's app, but it failed. This can be a server issue, a connectivity problem on your phone, or a mismatch between the app and the charger.
Seeing this on the charger right now?
- Don't unplug while the charger is active. Wait for the screen to update.
- Try stopping and restarting the session from the charging app or RFID card.
- If the error persists, move to a different connector or charger if available.
Read the full explanation below, or scan the charger screen with EVcourse for instant help.
What to do
- Check your phone's internet connection (try switching between WiFi and mobile data)
- Close and reopen the app, then try again
- Try using an RFID card or contactless payment instead
- Check the app for server status messages or known outages
Technical details
- Error code
- AppSessionStartFailed
- Category
- Payment
- Classification
- authorization
- Source
- Based on data from U.S. Department of Energy AFDC. EVcourse is not affiliated with U.S. Department of Energy AFDC.
Seeing this error at the charger?
Drivers can verify this specific error by scanning the screen with EVcourse. The app reads any charger display, any language. Free to try on iOS.
Other errors
From Finn, engineer: This error code is part of the ChargeX MREC standard used across public charging networks. Always follow the instructions on the charger display. If the error persists, contact the charging network's support line or try a different charger.
The EVcourse app provides instant troubleshooting and expert explanations at the charger. Scan any station or car screen for step-by-step help, free to start on iOS.
Don't understand the screen? Scan it.
Point your phone at any charger or car screen for instant help. Any brand, any language. Free to try on iOS.
Free to try on iOS. Android coming soon. Join the Android waitlist.