E08
BYD
Internal Communication Failure (MCU–Power Module)
Charger shows E08 and does not start charging; sometimes occurs after lightning storms or surges.
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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
Damaged communication bus between main control PCB and power module, Firmware corruption on power module, Loose internal harness connector, Surge damage to control electronics
How to Fix / Troubleshooting
Safety first: Internal communication faults usually require opening the unit. Only qualified personnel should do this.
- Power-cycle the charger: Turn off the breaker for 5 minutes, then restore power. This can clear transient communication errors.
- Check for recent storms or surges: If E08 appeared after a storm, consider having an electrician check for broader electrical damage and install surge protection.
- Listen and observe on startup: Note if the display boots normally or shows garbled text, which may indicate deeper control board issues.
- Professional diagnosis: A technician should open the BYD charger, reseat internal harness connectors between the main control PCB and power module, and run BYD diagnostics.
- Replace damaged boards: If communication ICs are damaged, replace the main control PCB or power module as a complete assembly.
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Repair Difficulty
Professional Required
5/5
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