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byd_chg01
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BYD · Electric & Hybrid Cars
AC Charging Module Fault
Quick Answer
Error code BYD_CHG01 on your BYD Electric & Hybrid Cars means: AC Charging Module Fault. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
BYD-A3BYD-DPBYD-HNBYD-SLBYD-SUBYD-SPBYD-TG
Likely Causes
  1. Onboard AC charging module internal component failure interrupting charging operation
  2. Input voltage or frequency outside acceptable range from the EVSE power supply
  3. Onboard charger overtemperature protection triggered by sustained maximum-rate charging
  4. AC charging module communication fault with BMS preventing charge session initiation
  5. Ground fault detection within the onboard charger circuit causing protective shutdown
How to Fix It
1
Disconnect the AC charge cable and wait 5 minutes before reconnecting to reset the charger module
2
Test charging at a different Level 2 EVSE to confirm whether the fault is vehicle-side or infrastructure-side
3
Check that the EVSE is providing stable voltage within the vehicle's accepted input range
4
Inspect the charge port pins for corrosion or damage and clean with a dry cloth
5
Schedule BYD service for onboard AC charging module inspection and replacement
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Onboard AC charging module
Charging module thermal management component
Charge port connector assembly
Related Error Codes
BYD_BMS01BYD_BMS02BYD_BMS03BYD_CHG02BYD_CHG03
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