Having a RTOD issue

The best idea I can offer is to start by fixing that part of the story.

Until you have a way to read the codes, you may need to rely on paying someone who can.

 

Open the hybrid inverter coolant reservoir. With the car in READY position...do you see coolant moving around inside the container? Behind the drivers side headlight is the inverter pump....reach down and you can feel it running. If you can't it has died. This happens about every 100K miles. BUy a NEW one from a TOYOTA Dealership about $174....look up videos on yooo tube on how to replace it by removing the drivers side headlight. NA model. This is just 1 possibility. There are lots of others.

 

Is the fan running in the back of the car pretty much anytime you're driving the car pull up at a stoplight and hear this fan running in the back right hand side of the car Is it running predominantly all of the time No maybe who knows find that out along with what's mentioned above about your inverter cooling loop and then we'll go from there of course you got to check your AM2 fuse and pretty much all fuses we want to have 12 volts going everywhere it's supposed to go all the time obviously your car is trying to tell you something you could go buy a cheap parts store they'll at least have a basic scanner and get the basic gist of the codes from that we can tell if there's any subcodes needed and maybe how to get those I don't know where you are so all of that too I guess it really doesn't matter can't imagine you can be an America and not be near a major auto parts store in which there are five to seven different brands depending upon what part of the country you live in but you never know

 

12v battery

 

Anyone have a clue what either RTOD or ROTD stand for?

 

Red Triangle Of Death

 

You You should do the down and dirty test from the service plug to ground and see if you count down to zero in DC volts on your test meter see if you have any inkling of isolation fault that will slowly cause all this funny business to go on until it gets worse and then it'll get worse on the light and then it'll get to the point where you have to clear the codes twice with an old style scan or just to make the car start again I usually check for this at least every 2 years

 

When you need to identify an error, you have a choice - to give $100, $200, $500 to someone at a car service center so that he can tell you the code of your errors.
Or you can diagnose it yourself for less money.

There are several options for self-diagnosing hybrid car systems. This can be the Techstream program installed on your laptop and a cable that will connect the car and the laptop.
Or an OBDII adapter and a phone with a program that can read error codes and broadcast them on the phone screen.
See this topic.

Gen2 OBD2 app review | PriusChat

 

or you can recognize that the P0AA6 HV Isolation fault is the only hybrid code that will give the RTOD, allow you to keep driving the car normally, but after turning the car off, will not allow the car to go to READY condition again. (unless the code is reset by either resetting with a scanner, or momentarily disconnecting the 12v battery. I had an 07 for a while that would get the P0AA6 every now and then after a heavy rain. Everything would clear up after the weather was dry for a couple days.

 

Most code readers that are at the parts store are not capable of communicating with all 15 (or so) systems on a Gen 2 Prius. So even if you get there, you might not be able to retrieve the codes.

Posted via the PriusChat mobile app.

 

If you start burning oil....which mine started to do.....I just check the level more often and change the oil myself every 4K miles with Mobil 1 and OEM Filters from Wal Mart...or dealership.. If you haven't in a while clean and clean your hybrid battery fan in the passenger rear cargo area. I use compressed air and q-tips and spray alcohol. I have also run Marvel Mystery oil in the gas tank on every other fill up.