XCMG Fault Code E4040 — Controller memory fault

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XCMG · E4040

Controller memory fault

What this code means

Controller memory (storage) fault.

Applies to: XE215/XE315/XE150 excavators.

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Source: XCMG excavator alarm & fault code table (徐工挖掘机报警故障信息统计), Scribd docs 736520125 & 441150619 (two copies agree). Cross-checked in two independent sources. Compiled 2026-10-30. No manufacturer affiliation.