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Boxer54, Toyota Technician
Category: Toyota
Satisfied Customers: 1755
Experience:  ASE Master tech with L1 certification, Toyota Master Diagnostic Technician
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2006 Prius If u see frequent purple lines but they turn blue

Customer Question

2006 Prius If u see frequent purple lines but they turn blue or green does this indicate a hybrid battery needs to be replaced?
Submitted: 1 year ago.
Category: Toyota
Expert:  Boxer54 replied 1 year ago.

Thank you for trusting us with your questions. Are you referring to the battery/engine display that is a function on the multi function display?

Customer: replied 1 year ago.
Customer: replied 1 year ago.
Sometimes it's purple and sometimes when starting it's blue
Expert:  Boxer54 replied 1 year ago.

The dealership gets a lot of questions about that monitor display. It is NOT an accurate representation of the HV battery state of charge. Primarily, that display is provided to the driver as a means of showing activity so driving habits can be adjusted to achieve maximum fuel economy. The colors change at preset levels on the display itself. The computers monitor the HV battery on a continuous basis and if there is a block in the battery that gets weak, the check engine light and hybrid warning light will come on. The battery normally goes through cycles of charging and discharging and this is normal.