Frustrated New Prius Owner

The most common issue with a high voltage leak is a leaking module. You might get lucky and something is loose but most likely a new or rebuilt battery pack is in your future. This is the least expensive way to fix it, but will last the shortest

Gen II Prius Individual Battery Module Replacement | PriusChat

 

Hopefully you have a second car to use if you do this. Next cheapest is:

Prius Battery Replacement (GenII) Like you've never seen - NEW Cylindrical Cells | PriusChat

1500 dollars and you can rehab and sell your good modules to knock that price down.

Last option is new factory battery. You might find one in the high 1600 range if you are lucky.

 

When you get in there you might find someone already did this to get rid of the car. It happens.

 

Factory service manual(free) + MiniVCI (8-15$) and Windows laptop(free?) can help you to diagnose ANY problem on this prius.

 

That at least is likely straightforward, due to failing TPMS (Tire Pressure Monitor System) sensors (one in each wheel) having failing batteries. The batteries are not replaceable, the whole sensor would need replacement to rectify, and the new sensors would need to be "introduced" to the car. Sensors are $50~80 apiece these days, and for a dealership to get the car to see them $75~100.

The simplest thing to do, is to just ignore the light, and of course keep an eye on your tire pressures.

 

I did replace batteries few days ago. CR2450 was been used. I did use power supply to keep sensor powered during battery replacement. It takes couple hours. To remove sensors i did use wood blocks and hydraulic jack.

 

hello did you ever figure out the solution for your car

 

Do you believe in the Tooth Fairy too? Used cars (especially old used cars) are sold as-is. He was really lucky the used car guy gave him the $200 back.