BYD
BYD EV Home Chargers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E01
Charging session will not start; charger display shows E01 immediately after plugging in the vehicle.
Proximity / Pilot Signal Fault
E02
Charger shows E02 and refuses to charge; vehicle may display 'Check power source' or 'Charging station error'.
Ground Fault / Residual Current Detection Trip
E03
Display shows E03 and charging stops or will not start; often occurs immediately after plugging in.
PE (Protective Earth) Fault / Ground Continuity Error
E04
Charger shows E04 and does not energize; may occur during hot weather or long charging sessions.
Overtemperature Protection Trip
E05
Charger displays E05 and refuses to start charging; sometimes occurs after a power outage or grid fluctuation.
Input Overvoltage Protection
E06
Charger shows E06 and stops charging; may occur during low grid voltage periods or when large loads start in the home.
Input Undervoltage Protection
E07
Charger displays E07 and immediately stops charging; vehicle may show 'Charging error – overcurrent'.
Output Overcurrent / Relay Weld Detection
E08
Charger shows E08 and does not start charging; sometimes occurs after lightning storms or surges.
Internal Communication Failure (MCU–Power Module)
E09
Charger displays E09 and refuses to charge; often associated with network or app control issues.
OCPP / Network Communication Error
E10
Charger shows E10 and stops charging; vehicle may indicate 'Charging interrupted – insulation fault'.
Insulation Resistance Fault (DC Leakage / Isolation Error)
E11
Charger displays E11 and will not start; often after incorrect wiring or installation changes.
Phase Sequence / Phase Loss Error (for 3‑phase BYD chargers)
E12
Charger shows E12 and the display may be blank or frozen; unit does not respond to button presses.
Display / HMI Communication Fault
E13
Charger displays E13 and charging stops shortly after starting; may repeat several times.
Contactor Feedback / Stuck Relay Error
E14
Charger shows E14 and refuses to start; often associated with RFID or access control issues.
Authentication / RFID Reader Fault
E15
Charger displays E15 and charging is limited or disabled; may show a message about load management or current limit.
Dynamic Load Management / CT Sensor Fault
E16
Charger shows E16 and will not start; may be accompanied by a message about 'vehicle not recognized' or 'EVSE handshake failed'.
EV Handshake / PWM Pilot Error
E17
Charger displays E17 and stops charging; may occur when scheduled charging or smart features are used.
Real-Time Clock / Scheduler Fault
E18
Charger shows E18 and refuses to start; may mention 'internal memory error' or 'configuration fault'.
Internal Memory / Configuration Corruption
E19
Charger displays E19 and charging current is reduced or disabled; may mention 'derating' or 'thermal limit'.
Power Module Derating / Overload Protection
E20
Charger shows E20 and refuses to start; may mention 'emergency stop active' or 'safety input'.
Emergency Stop / External Interlock Active
Symptom
BYD charger cannot connect to Wi‑Fi or loses connection frequently; app shows the charger as offline.
Wireless Connectivity / Wi‑Fi Signal Issue
Symptom
Charger display is very dim, flickering, or unreadable, but charging still works.
Display Backlight / HMI Power Issue
Symptom
Charger enclosure or cable emits a noticeable burning or plastic smell during or after charging.
Overheating Component / Insulation Breakdown
Symptom
Charger frequently starts and stops charging in short cycles, even though the vehicle remains plugged in.
Unstable Pilot / Vehicle Communication Cycling
Symptom
Charger has no power at all; display is off and LEDs are dark even when breaker is on.
No AC Supply / Internal Power Supply Failure
Symptom
Charger intermittently stops charging mid-session without any error code; charging resumes if unplugged and replugged.
Intermittent Pilot Drop / Loose Connection
Symptom
Charger makes loud buzzing or humming noises during operation, louder than usual, without showing an error code.
Mechanical Vibration / Coil Buzz in Contactor or Transformer
Symptom
Charger or cable becomes unusually hot to the touch during normal charging, but no error code is shown.
Overheating Connector / High Contact Resistance
Symptom
Charger powers on but will not start charging; no error code displayed, vehicle shows 'charging not started'.
Standby Only / Pilot Not Activating
Symptom
Charger trips the household RCD or breaker as soon as a charging session starts, but no error code is displayed on the charger.
Nuisance Tripping / High Inrush or Leakage
Symptom
Charger’s enclosure vibrates or rattles when the contactor closes or during charging.
Mechanical Mounting / Enclosure Resonance
Symptom
Charger’s front LEDs blink in an unusual pattern and the unit beeps repeatedly, but no clear error code is shown.
Non-Critical Warning / Status Indication
Symptom
Charger’s internal fan runs very loudly or continuously, even at low charging currents or when idle.
Cooling Fan Control / Thermal Management Issue
Symptom
Charger’s maximum current setting cannot be increased to the expected value, limiting charging speed.
Current Limit Configuration / Hardware Constraint
Symptom
Charger’s RFID card reader sometimes fails to detect cards or requires multiple attempts.
Weak RFID Reading / Antenna Issue
Symptom
Charger’s scheduled charging does not start at the programmed time, even though the vehicle is plugged in.
Scheduling / Timer Misconfiguration
Symptom
Charger’s touch buttons or capacitive keys do not respond reliably, making it hard to start or stop charging.
Unresponsive Touch Panel / Keypad Fault
Symptom
Visible water or condensation inside or around the BYD charger enclosure; occasional charging failures in wet weather.
Moisture Ingress / Compromised Sealing
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Charging session will not start; charger display shows E01 immediately after plugging in the vehicle.
|
Proximity / Pilot Signal Fault | View Details |
| E02 |
Charger shows E02 and refuses to charge; vehicle may display 'Check power source' or 'Charging station error'.
|
Ground Fault / Residual Current Detection Trip | View Details |
| E03 |
Display shows E03 and charging stops or will not start; often occurs immediately after plugging in.
|
PE (Protective Earth) Fault / Ground Continuity Error | View Details |
| E04 |
Charger shows E04 and does not energize; may occur during hot weather or long charging sessions.
|
Overtemperature Protection Trip | View Details |
| E05 |
Charger displays E05 and refuses to start charging; sometimes occurs after a power outage or grid fluctuation.
|
Input Overvoltage Protection | View Details |
| E06 |
Charger shows E06 and stops charging; may occur during low grid voltage periods or when large loads start in the home.
|
Input Undervoltage Protection | View Details |
| E07 |
Charger displays E07 and immediately stops charging; vehicle may show 'Charging error – overcurrent'.
|
Output Overcurrent / Relay Weld Detection | View Details |
| E08 |
Charger shows E08 and does not start charging; sometimes occurs after lightning storms or surges.
|
Internal Communication Failure (MCU–Power Module) | View Details |
| E09 |
Charger displays E09 and refuses to charge; often associated with network or app control issues.
|
OCPP / Network Communication Error | View Details |
| E10 |
Charger shows E10 and stops charging; vehicle may indicate 'Charging interrupted – insulation fault'.
|
Insulation Resistance Fault (DC Leakage / Isolation Error) | View Details |
| E11 |
Charger displays E11 and will not start; often after incorrect wiring or installation changes.
|
Phase Sequence / Phase Loss Error (for 3‑phase BYD chargers) | View Details |
| E12 |
Charger shows E12 and the display may be blank or frozen; unit does not respond to button presses.
|
Display / HMI Communication Fault | View Details |
| E13 |
Charger displays E13 and charging stops shortly after starting; may repeat several times.
|
Contactor Feedback / Stuck Relay Error | View Details |
| E14 |
Charger shows E14 and refuses to start; often associated with RFID or access control issues.
|
Authentication / RFID Reader Fault | View Details |
| E15 |
Charger displays E15 and charging is limited or disabled; may show a message about load management or current limit.
|
Dynamic Load Management / CT Sensor Fault | View Details |
| E16 |
Charger shows E16 and will not start; may be accompanied by a message about 'vehicle not recognized' or 'EVSE handshake failed'.
|
EV Handshake / PWM Pilot Error | View Details |
| E17 |
Charger displays E17 and stops charging; may occur when scheduled charging or smart features are used.
|
Real-Time Clock / Scheduler Fault | View Details |
| E18 |
Charger shows E18 and refuses to start; may mention 'internal memory error' or 'configuration fault'.
|
Internal Memory / Configuration Corruption | View Details |
| E19 |
Charger displays E19 and charging current is reduced or disabled; may mention 'derating' or 'thermal limit'.
|
Power Module Derating / Overload Protection | View Details |
| E20 |
Charger shows E20 and refuses to start; may mention 'emergency stop active' or 'safety input'.
|
Emergency Stop / External Interlock Active | View Details |
| – |
BYD charger cannot connect to Wi‑Fi or loses connection frequently; app shows the charger as offline.
|
Wireless Connectivity / Wi‑Fi Signal Issue | View Details |
| – |
Charger display is very dim, flickering, or unreadable, but charging still works.
|
Display Backlight / HMI Power Issue | View Details |
| – |
Charger enclosure or cable emits a noticeable burning or plastic smell during or after charging.
|
Overheating Component / Insulation Breakdown | View Details |
| – |
Charger frequently starts and stops charging in short cycles, even though the vehicle remains plugged in.
|
Unstable Pilot / Vehicle Communication Cycling | View Details |
| – |
Charger has no power at all; display is off and LEDs are dark even when breaker is on.
|
No AC Supply / Internal Power Supply Failure | View Details |
| – |
Charger intermittently stops charging mid-session without any error code; charging resumes if unplugged and replugged.
|
Intermittent Pilot Drop / Loose Connection | View Details |
| – |
Charger makes loud buzzing or humming noises during operation, louder than usual, without showing an error code.
|
Mechanical Vibration / Coil Buzz in Contactor or Transformer | View Details |
| – |
Charger or cable becomes unusually hot to the touch during normal charging, but no error code is shown.
|
Overheating Connector / High Contact Resistance | View Details |
| – |
Charger powers on but will not start charging; no error code displayed, vehicle shows 'charging not started'.
|
Standby Only / Pilot Not Activating | View Details |
| – |
Charger trips the household RCD or breaker as soon as a charging session starts, but no error code is displayed on the charger.
|
Nuisance Tripping / High Inrush or Leakage | View Details |
| – |
Charger’s enclosure vibrates or rattles when the contactor closes or during charging.
|
Mechanical Mounting / Enclosure Resonance | View Details |
| – |
Charger’s front LEDs blink in an unusual pattern and the unit beeps repeatedly, but no clear error code is shown.
|
Non-Critical Warning / Status Indication | View Details |
| – |
Charger’s internal fan runs very loudly or continuously, even at low charging currents or when idle.
|
Cooling Fan Control / Thermal Management Issue | View Details |
| – |
Charger’s maximum current setting cannot be increased to the expected value, limiting charging speed.
|
Current Limit Configuration / Hardware Constraint | View Details |
| – |
Charger’s RFID card reader sometimes fails to detect cards or requires multiple attempts.
|
Weak RFID Reading / Antenna Issue | View Details |
| – |
Charger’s scheduled charging does not start at the programmed time, even though the vehicle is plugged in.
|
Scheduling / Timer Misconfiguration | View Details |
| – |
Charger’s touch buttons or capacitive keys do not respond reliably, making it hard to start or stop charging.
|
Unresponsive Touch Panel / Keypad Fault | View Details |
| – |
Visible water or condensation inside or around the BYD charger enclosure; occasional charging failures in wet weather.
|
Moisture Ingress / Compromised Sealing | View Details |
No matching codes found
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