HP Designjet T2300 Engine PCA and Power Supply CN727-67018 Hewlett-Packard this is most likely the

this is most likely  the part that is failing

so if you replace the encoder sensor

System error codes related to the interconnect PCA:

HP Designjet T770 printer series

*The original sensor unit can remain installed

HP Designjet T2300 Engine PCA and Power Supply CN727-67018 Hewlett-Packard this is most likely theCondition: Refurbished, Live tested Warranty: 12 months T2300 Engine PCA (Main PCA Logic Board) and Power Supply CN727 67038, CR647 67010, CN727 67018 Main logic board and power supply assembly for 24" and 44" Designjet HP Designjet T2300 plotters. This is a refurbished part warrantied for 1 year. Errors related to the main PCA and power supply: Error 01. 0: YZ (also caused by the formatter) Error 01. 1: YZ (also caused by the formatter) Error 08: 11