U062ALost Communication With A/C Refrigerant Distribution Valve Actuator A
- Generic OBD-II code · Network
- How the car detects it
- Heat pumps and battery-cooling circuits need valves that redirect refrigerant, for example hot gas from the outer heat exchanger to an inner one when the system switches from cooling to heating. Suppliers such as Egelhof build these as motor-driven switching valves that replace two or more solenoid valves and are commanded digitally, partly via LIN. U062A is set when actuator A no longer answers its controller. No manufacturer documents U062A publicly. How serious it is depends on what the valve feeds: BMW, for one, lit the MIL on the i3 for a jammed refrigerant shutoff valve in the battery cooling branch (its own code 21F0D0). Hardwired versions of valve A report P2611 to P2613, P266F or the mechanical fault P0EC9.
- What you may notice
- Switching between cooling and heat-pump mode fails
- No cabin heat from the heat pump or no cooling in one branch
- Thermal system warning, possibly reduced charging or drive power
- Likely causes
- LikelyLIN, supply or ground wire to valve actuator A damaged
- PossibleMoisture or corrosion in the actuator connector
- PossibleActuator electronics failed
- RareSoftware fault in the controlling module (reprogramming may be needed)
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.