Featured We own a 2007 Prius Gen 2. UK. 267k on the clock..Toyota cannot help.Can you?

Car is generally shipped with two key. You don't mention a second I'mguesd8ng you know have sounds like a new fob or key replacement . Toyota using their software can tell you how many keys have been produced for this car over. If you've had it since it was new . It should be the original 2 keys . Maybe they need to probe with Toyoda software . The antenna at slot may be going out the slot is an amplifier . It has a sticker on bottom of it stating so. From the famous movie we have failure to communicate. The fob to the car that is

 

welcome!
are there any trouble lights on the dash? any other symptoms besides the alarm?

 

What a smith can do with a tool like Autel key tool is access you're transponder codes clone them see if car is accessible by the tool to sort out the issue .the key tool can gather and report all transponder and security codes . And the key tool will operate system as key fob should then it can report back on where the handshakes are or happening . Or you can go through almost a complete book of one of the manual sets on the security system troubleshooting it is extensive . It'll probably take 6 hrs of time

 

It sounds like the problem could also be in your fob (pressing the unlock button shorts to the panic button). If you have it, try another fob. If you don't, consider buying one and have it programmed to your car. Check to see if the fob batteries you got were new and hadn't been sitting on the shelf for a few years.

As to the CV axle, Toyota ones are pricey. Aftermarket ones are more reasonable, but can be questionable. As long as your original one is still good, try to have the boots replaced. You may want to have the boots replaced on the other one at the same time - at 267K, I'd bet the other one is due for a replacement set of boots as well. Popping them out of the transaxle is a bit tricky. On the passenger's side, I could get a pry bar or a large flat-bladed screwdriver (I don't remember which one I used) to pry the axle out of the transaxle. The driver's side was a bunch of trouble as I couldn't really get my pry bar in position. I ended up borrowing a slide hammer with an attachment that fit over the "tulip" near the transmission. Here in the states, you can sometimes loan those from the auto parts stores. I don't know about in the UK.

You'll also lose about 1/2 of your transaxle fluid when you pop the axle out, so you may just want to just get 4 quarts of the ATF-WS and replace the entire amount anyway.

I wouldn't mess with a 22V battery. I don't think the 12V system is ready for 22V. The original on my Gen 2 lasted far longer than 6 years.

 

Did you ever charge the 12v battery up to a full charge with a legit smart charger of 10amp or greater? You need at least 12.7 volts for the battery to be good, not 12.3v. Either the battery they installed is defective or it never recieved a proper charge and your car is not designed to full charge your battery unless you drive non-stop for 12 hours.

You keep saying you don't like going to the Toyota Stealership, yet you keep going back? Why is that? They are warranty specialists who try to do the most expensive warranty repairs possible. Once your car is out of warranty they'll destroy you with frivolous overpriced charges. If you have a friend or family member who works on cars this website will make it easy for them to take care of everything. If you don't have that, find a neighborhood mechanic that's reasonably honest to work with.

Your FOB problem could be the people who installed the batteries messed up, or it could simply be the low 12v power causing glitches.