D4 Too high UREA Temperature in Pump module or Leakage test failed (Emergency shut off) - urea leakage detection (static or dynamic) - P202D Dynamic urea leakage test - Leakage detected
Too high UREA Temperature in Pump module or Leakage test failed (Emergency shut off) - urealeakage detection (static or dynamic) - P202D Dynamic urea leakage test -Leakage detected
Hissing noise at expansion valve, Loss of refrigerant.Restriction in refrigerant system.Check receiver-dryer for uniformity of temperature.