Fault Codes:
Hyundai HX220 NL EPFC 121-4
Solution:
1. Check for open circuits or short circuits in the CD-518(#B)-CN-505(#53) lines 2. Check for open circuits or short circuits in the CD-518(#A)-CN-505(#43) lines 3. Check for open circuits or short circuits in the CD-518(#C)-CN-505(#24) lines
Fault Description:
For 10 seconds, the P2 pump output pressure sensor measures a voltage of less than 0.3V
Fault Location:
1. Monitor -P2 pump output pressure display fault 2. Control function - The automatic voltage boost operation fails, and the compensation control overload fails
