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Heli Forklifts · SPN 520502 FMI 4
Left side shift valve short to ground

What this code means

Left side shift valve shorted to ground (SPN 520502, hex 0x7F136).

Applies to: G3 Series IC CPCD20-35 with fingertip control (J1939 SPN/FMI codes).

Possible causes / checks (from the source)

Per manual resolution: fix the issue, restart controller.

Need the part?

If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (SPN 520502 FMI 4), machine model and serial number — we quote genuine and OEM replacement parts for export.

Source: HELI G3 Series Fingertip Error Codes (manufacturer document, HELI Canada document library doc.heliforklift.ca). Single published source — confirm against the manual for your exact model before ordering parts. Compiled 2026-10-30. No manufacturer affiliation.