OBD-II code · Network
U0695 Lost Communication With Hybrid/EV Battery Pack Coolant Pump B
The vehicle bus reports loss of communication with smart HV battery pack coolant pump B. Active battery cooling cannot be commanded; charging/discharging power may be limited.
Is it safe to drive with U0695?
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
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Hv Battery Coolant Pump B, Vehicle Bus Wiring
Related codes
- U0694Lost Communication With Hybrid/EV Battery Pack Coolant Pump A
- U0692Lost Communication With Exhaust Pressure Sensor B
- U0693Lost Communication With Humidity Sensor
- U0696Lost Communication With Particulate Filter Pressure Sensor C
- U0697Lost Communication With Particulate Filter Pressure Sensor D
- U0698Lost Communication With Coolant Pump E
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.