What are the potential long-term consequences of ignoring the E5 error on my Canon Pixma E5?

Ignoring the E5 error can lead to further printer malfunctions. If the issue is related to cartridges, it might eventually damage the print head or other components due to incorrect ink delivery. Prolonged issues can also shorten the lifespan of your printer and potentially void the warranty if using non-genuine parts caused the problem.