Will my warranty cover my hybrid battery pack under the California Emission Control Warranty?

For the hybrid vehicle battery, it’s a moot point. Under the California Emission Control Warranty, coverage for the hybrid vehicle battery is limited to “10 years or 150,000 miles, whichever comes first,” which would have ended ten years after the car’s date of first use, presumably some time in 2014, 2015, or 2016. See the chart on page 6 and the note on page 22 of the Prius Owner’s Warranty Information (PDF) booklet.

As to the other parts listed on page 22 of the booklet, I agree that the text could be read as extending coverage in states that subsequently adopted California’s rules, but that’s not the interpretation in the Toyota Warranty Policy and Procedures Manual, available by subscription to techinfo.toyota.com, which states in Policy 4.7, California Emission Warranty:

Vehicles equipped with a California Certified Emission Control System that are registered and operated in California or any state* that adopts California emission warranty provisions are covered under this warranty.​

The asterisk note includes model years (emphasis added):

*Currently Connecticut (starting with 05MY), Delaware (starting with 14MY), Maine (starting with 04MY), Maryland (starting with 11MY), Massachusetts (starting with 04MY), New Jersey (starting with 05MY), New York (starting with 2004-2015MY ZEV models only; all models starting with 16MY), Oregon (starting with 08MY), Pennsylvania (starting with 08MY), Rhode Island (starting with 05MY), Vermont (starting with 04MY), Washington (starting with 09MY). California-specification vehicles shipped to other states’ dealers do not assume coverage under the California Emission Warranty.
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Toyota’s Manual is binding only on dealers and isn’t part of the warranty terms, of course, but I’m not sure it would be worthwhile to try to change their position.

 

I'm a couple hours north of you and work on Hybrid battery packs for friends and family and on rare occasion folks like yourself on Priuschat. In some cases the earliest stage of a battery pack failing can be repaired inexpensively it it's a corrosion in the wiring kind of problem or pack has lost capacity and needs reconditioning.

In other cases a failed cell, or at least the first one to fail can be replaced and you can often get another year or two of trouble free driving.

Alternatively, you could buy a healthy pack from a wrecked Prius, or a brand new pack that could be used in your current Prius and in your future Gen2 or Gen3 Prius are now priced as low as $1650 and only takes 2 hours to install.

 

2005 Prius is covered only to 10 years which means 2015 or 150k which every comes first. Also that means only California cars and states which adopted the provision.
Crap of out luck... but getting a used working hybrid battery or reconditioned battery pack is cheap these days and tons of shops now offer those services but I would buy a reconditioned with warranty and try to install it your self. Many videos online for the DIYers. If know how to change oil and have tools. I give you an 75-100% chance of doing job correctly.

SM-J737T1 ?

 

Your asking a question that would have the same outcome either way as your car is well over 10 years old. Better you should ask for help on your options for fixing your battery, that’s where you need to focus your attention. Best advice so far is to ask @PriusCamper for help.

 

If you are going to DIY the best option is @2k1Toaster kit of new cells linked in my signature. $1600 delivered gives you basically a new battery. You can then sell any unfailed old modules to reduce your cost.