OBD-II code · Network
U064A Lost Communication With Hybrid/EV Battery Pack Current Sensor A
The vehicle bus reports loss of communication with smart HV battery pack current sensor A. SoC and charge/discharge current limits switch to a substitute model.
Is it safe to drive with U064A?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Hv Battery Current Sensor A, Vehicle Bus Wiring
Related codes
- U064BLost Communication With Hybrid/EV Battery Pack Current Sensor B
- U064CLost Communication With Hybrid/EV Battery Pack Current Sensor C
- U0647Lost Communication With Motor Electronics Coolant Pump B
- U0648Lost Communication With Motor Electronics Coolant Pump C
- U0649Lost Communication With Coolant Pump D
- U064DLost Communication With Trailer Brake Control Switch
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.