Weak primer motor or underpowered motor
Last updated: February 22, 2026
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HP Z9+ System error: 0021-0002-0017
Weak primer motor or underpowered motor
- 1
Turn off/on. Check cable to prime pump & PCA, Replace cables, replace Pump motor, replace the Print bundle PCA.
Reference diagrams for common repair procedures related to this error:
Carriage Belt Replacement
Note: These diagrams are for reference only. Always consult official HP service documentation and follow proper ESD precautions.
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The motor that drives the carriage assembly horizontally across the platen. It's responsible for the precise left-right movement of the printheads during printing.
The motor responsible for feeding media through the printer in precise increments between each pass of the printhead carriage.
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