"Triangle of death", ABS, and check engine lights.

As long as you've got Techstream on the way, you'll pretty much just feed your anxieties by continuing to speculate while it's still on the way. Watch a movie, go out for ice cream, you'll be able to read the codes soon enough, and there are lots of reasons those lights can come on.

-Chap

 

Consider checking your 12V battery pocket area for stagnant water build up. I have a friend that services both 12V and HV batteries. He mentioned that on several accounts that every once in a a while he finds +6 inches of water in a client's 12V battery pocket. It feeds slowly over time from micro tears emanating from the roof-trunk area. Its definitely bad news, but can be drained from a plug in that pocket.

attached is a rusty picture of my current 2005 Prius 12V battery pocket bay.

 

the rain gutters are the usual suspect, but some hatch points have also proved problematic.

 

I'd recommend changing the order of (1) and (2). It's easier to read the codes before you clear them.

Clearing codes is like turning up the radio so you don't hear a bearing going bad. The codes are gone, the problem isn't. Some kinds of problem will be re-detected right away and set codes again, so you don't lose much time, but others may take days or weeks of driving before you get your next chance to collect the information you flushed by clearing the codes.

-Chap

 

Hard for me to tell; it's not a problem I've personally dealt with (knocks wood). It certainly doesn't look pristine there. I don't know if I could go from that to whether it's cracked, by the picture alone. Maybe someone who's dealt with it before?

-Chap

 

seems you have some advanced leaking and need to [sooner vice later] diagnose where its emanating from.

- Rip out the rear upholstery interior from rear window backward. That will give you a better look at what is still wet, what is bone dry and what is now rusty but was wet long ago. Trails of wet or rust will give you a great history from whence your car came from. You are probably not going to like what you may find hidden underneath your linings (such as mold and uneaten pizza crusts) but you will sleep better.
- If you have the time, I would go ahead and thoroughly clean & caulk those roof-trunk channels; consider using alcohol and cotton balls (or something of the such) to prep the surface for caulking. You will never see this caulk anyhow, as it is well hidden when trunk closed. It wont cost much $, only a bit of your time. It will help you better diagnose where these leaks are/are not coming from.

think positive and dry thoughts...

 

From reading this complete thread and now all your lights are gone, I believe you have a failed inverter pump. Go drive it for a bit and if your lights return, it's most likely the case. When the red triangle is there, most likely your AC will also not blow cold air.

The reason you don't see the warning lights now is because the car has cooled and it's operating at a normal temperature. Once it gets hot again from not having a properly working inverter coolant pump, your warning lights will come back.

Your MINI VCI cable will be useful when the warning lights are there....

 

It seems these pumps fail every 100k miles or so, it's an electronic wearing part.

If there was a recall on your tires, you would only get 1 set of tires, 2nd set would be on you.

 

QUOTE="Blackwing, post: 2543490, member: 154064"]If memory serves me correctly this is the 12v aux battery. I had replaced this myself in the summer of 2011. Six years ago. Looks like it's time to check the voltage and drop $100 on another Toyota OEM. We also had a lot of rain recently, so I'll check for any leaks, rust, excess water.


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Update with findings.

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when you have the 12 volt battery out push out the rubber body plug under it so you don't have a swimming pool in the trunk.... get some sealant and reseal the body gaps in the hatchback and under the roof molding.. common problem on gen 2 prius'

 

You were told this way back in post #20

Haha, reading DTCs does not make you ToyoTech. There is a bit more to it than that.

He wasn't, but if you have water pooling there, it would be a good idea. There is also a bung in the battery compartment, as well as one on the other side. You should remove any where you currently have standing water pooling until you seal up the leaks.

See this thread: "Water leak...into spare tire area etc | Page 3 | Post 49 | | PriusChat" for details.