What do E03, E06, and E10 codes mean on a Kobelco SK70SR-1E?

Lucciano M.

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43
My 2004 Kobelco SK70SR-1E has E03, E06, and E10 codes. The boom idles down when swinging left or extending straight out, even after replacing the SE5 low-pressure sensor. What could cause this hydraulic problem?
 
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