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BYD · Electric & Hybrid Cars
Drive Motor Overtemperature
Quick Answer
Error code BYD_MOT01 on your BYD Electric & Hybrid Cars means: Drive Motor Overtemperature. 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. Sustained high-torque or high-speed operation exceeding motor thermal capacity
  2. Motor cooling system underperformance due to low coolant or pump malfunction
  3. Motor winding insulation degradation increasing internal resistive heat generation
  4. Ambient temperature combined with performance driving reducing available thermal margin
  5. Blocked motor cooling passages reducing heat dissipation effectiveness
How to Fix It
1
Reduce throttle input immediately and transition to light driving to lower motor thermal load
2
If the warning persists, pull over safely and allow the motor to cool for at least 20 minutes
3
Check drive motor coolant level and inspect coolant lines for leaks or restrictions
4
Monitor motor temperature via the vehicle service display after cooling and during restart
5
Contact BYD service if overtemperature occurs during normal driving cycles
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
Drive motor coolant fluid (BYD-specified)
Motor coolant pump assembly
Coolant hose and fitting repair kit
Related Error Codes
BYD_BMS01BYD_BMS02BYD_BMS03BYD_CHG01BYD_CHG02
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