U064CLost Communication With Hybrid/EV Battery Pack Current Sensor C
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- A third pack current sensor, C, appears where a battery has parallel strings or a separate measuring point, for instance in a battery junction box, that each need their own current value. U064C means that this sensor no longer delivers its data frames to the battery controller. No manufacturer documents U064C or the place of sensor C publicly. Because the remaining sensors cannot see the current in the branch that C watches, the controller usually lowers the permitted current for the whole pack instead of guessing. CARB's energy storage provisions treat it as a monitored input. For an analog sensor C, P2BE4 to P2BE7 would cover the circuit. LEM offers its CAB sensors up to 1,500 A, which shows the current class involved.
- What you may notice
- Battery warning lamp
- Reduced power and slower charging
- Likely causes
- PossibleData or supply wiring of sensor C damaged
- PossibleCurrent sensor C failed
- RareLoose connector at the battery junction box
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.