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byd_chg02
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BYD · Electric & Hybrid Cars
DC Fast Charge Protocol Error
Quick Answer
Error code BYD_CHG02 on your BYD Electric & Hybrid Cars means: DC Fast Charge Protocol Error. 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. CHAdeMO or CCS protocol handshake failure between the vehicle and the DC fast charger
  2. Vehicle DC fast charge controller firmware incompatibility with the charging station software
  3. Corroded or damaged DC fast charge inlet pins on the vehicle side
  4. High-voltage contactor fault preventing the DC charge circuit from completing
  5. DC fast charger station output exceeding vehicle-accepted maximum charge rate
How to Fix It
1
Disconnect from the DC fast charger, wait 60 seconds, and attempt reconnection
2
Try a different DC fast charger at another station to rule out charger-specific compatibility issues
3
Inspect the DC fast charge inlet for bent pins, corrosion, or debris and clean if necessary
4
Attempt AC Level 2 charging to verify the onboard charging system is otherwise functional
5
Contact BYD service for DC charge controller module inspection and HV contactor testing
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
DC fast charge controller module
DC fast charge inlet assembly
High-voltage contactor replacement
Inlet pin cleaning and repair kit
Related Error Codes
BYD_BMS01BYD_BMS02BYD_BMS03BYD_CHG01BYD_CHG03
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