OBD-II code · Network
U062E Lost Communication With A/C Refrigerant Expansion Valve Actuator
The vehicle bus reports loss of communication with smart A/C refrigerant expansion valve actuator (electronic expansion valve, EXV). Refrigerant flow into the evaporator cannot be modulated.
Is it safe to drive with U062E?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
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
- AC Expansion Valve Actuator, Vehicle Bus Wiring
Related codes
- U062BLost Communication With A/C Refrigerant Distribution Valve Actuator B
- U062CLost Communication With A/C Refrigerant Distribution Valve Actuator C
- U062DLost Communication With A/C Refrigerant Distribution Valve Actuator D
- U062FLost Communication With Coolant Pump C
- U0630Lost Communication With Engine Coolant Temperature Sensor 4
- U0631Lost Communication With Engine Coolant Temperature Sensor 5
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.