Signs of a an almost bad traction battery?

sounds shot to me, but they aren't going to cover it if it isn't throwing a code. also, take out the ev mod before bringing to the dealer. is the 12 volt okay?

 

It sounds like natural aging. The battery simply isn't going to deliver as much as it did when new. The EV mod accelerated the process a little too. But without any actual problem, just reduced performance, there really isn't much to worry about.

 

If you advise them to hide the fact they have been abusing their Prius, everyone pays more because some abuse the system. Much better for those who made modifications to take the brunt of making stupid modifications.

 

Drive it until it dies but keep about $1,400 for a rebuilt in the bank.


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The other option is sell it or trade it in and get a Honda Civic and put the battery fear behind you for good.

 

I agree but... Most everyone who does put in the ev mod uses it rarely because there's very little benefit from it other than very short distances and if ev mod could significantly harm a battery they'd of not sold every Prius other than the US ones with that option. Then again only Toyota knows the true reason they removed ev mode from US models, we can speculate that it relates to having to offer 150K battery warranty in some states, but we can't be certain.

 

If your battery finally throws a credible error code and you're a few thousand miles over 150K Toyota traditionally cuts you some slack. and replaces it under warranty anyways.

 

If you still under warranty For smother 1,000 miles I would bring it to the dealer and ask them to check the traction battery. They may uncover something

 

Wow! Awesome link! Thanks!

 

there is a way to test battery health. i don't know if the dealers can do it, but they measure all the individual cell voltages to see how much variation there is. are you near san fran? unfortunately, they still won't warranty it without a code.

 

That's good to know. We have an EV button as std equipment on the Australian and UK models, but like yourself I use it very sparingly.

Re the "EV mode is not currently available" message, that is often a sign of the battery being a little warm. You should check your rear cooling fan for gunk build up as soon as possible. When mine was gunked up with dog hair I got that EV denial much more often, and I think it decreased the battery performance a little bit too. See Fur and dirt causing major battery problems | Page 2 | PriusChat

The other things that give EV denial are the engine in "Stage 1" warm up and low SOC.