23 Voltage supply 3 - Coolant control valve and reverting valve (UB3) electrical - Short to bat at UB3 with Key 15 off - P20A3 Vent valve (Reductant Purge Control Valve) - Short circuit high
Voltage supply 3 -Coolant control valve and reverting valve (UB3) electrical - Short to bat at UB3 with Key 15 off - P20A3 Vent valve (Reductant Purge Control Valve) -short circuit high
Hissing noise at expansion valve, Loss of refrigerant.Restriction in refrigerant system.Check receiver-dryer for uniformity of temperature.