Under-voltage, over-voltage, leakage or ink shortage detected
Last updated: February 22, 2026
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System error code: 86:01 on HP T790 T1300 T2300 Designjet Printer
System error code: 86:01 on HP T790 T1300 T2300 Designjet Printer See this video: https://youtu.be/Lhb-g4gKpKE Carriage ...
Under-voltage, over-voltage, leakage or ink shortage detected
- 1
Replace printhead. Reseat Trailing cable. Replace Carriage PCA. Replace Carriage without PCA/Line sensor. Replace Engine PCA.
Reference diagrams for common repair procedures related to this error:
Carriage Belt Replacement
Formatter Board Location & Connections
Ink System Components & Flow Path
Note: These diagrams are for reference only. Always consult official HP service documentation and follow proper ESD precautions.
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The complete system that stores, transports, and delivers ink from the cartridges to the printheads, including tubes, valves, and pressure regulators.
HP 711 ink cartridges are available in black (80ml/38ml), cyan, magenta, and yellow (29ml) for DesignJet T120, T520, T125, T130, T525, and T530 printers.
HP 727 ink cartridges come in 6 colors for DesignJet T920, T930, T1500, T1530, T2500, T2530, and T3500 printers.
HP 728 ink cartridges are available in 4 colors for DesignJet T730 and T830 printers.
HP 730 ink cartridges come in 6 colors for DesignJet T1600, T1700, and T2600 series printers.
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