Home › SDLG (Lingong) › 04
SDLG (Lingong) · 04
Preheater driver fault
What this code means
Preheater driver fault.
Applies to: LG6210E excavator.
Possible causes / checks (from the source)
Per the manual: preheater relay circuit is shorted or open (pins VB50, VB13).
Need the part?
If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (04), machine model and serial number — we quote genuine and OEM replacement parts for export.
Ask for the replacement part on WhatsAppSource: SDLG LG6210E Hydraulic Excavator Maintenance Manual, diagnostic code table (pp.763-764), Scribd doc 955818213. Single published source — confirm against the manual for your exact model before ordering parts. Compiled 2026-10-30. No manufacturer affiliation.