Fault Codes:
Hyundai HX220 NL EPFC 4156（5746-4）
Fault Description:
Aftertreatment 1 diesel exhaust fluid dosing unit heater relay-Voltage below normal,or shorted to low source.Low signal voltage detected at the aftertreatment diesel exhaust fluid dosing unit heater relay circuit. Post-treatment 1 Diesel engine exhaust treatment fluid injection unit heater relay - voltage lower than normal value or short-circuited to low power supply. The signal voltage of the relay circuit of the heater in the exhaust gas treatment liquid injection unit is detected to be too low.
Fault Location:
Possible reduced engine performance. It may lead to a decline in engine performance.
