Red triangle of death with vsc and tpi. No check engine.

12 volt battery is the first thing to test..
if its good then your traction battery is dying

 

1. ((!)) is not a tire pressure warning. It is a warning that the brake system has a problem.
2. Check the inverter coolant reservoir to see if fluid turbulence exists when the Prius is READY. If you do not see this, then the inverter coolant pump has failed. The inverter overheats which depresses voltage on the 12V bus when the DC/DC converter stops working, and that would be the root cause of the skid control ECU warning lights coming on.
3. If the inverter coolant pump is good, then get Mini VCI so that you can retrieve the DTC logged by the skid control ECU. That will give you a clue about what is wrong with your car's braking system.

 

You are correct.

 

Yes, DTC P0A2B means that temperature sensor #1 in the transaxle has failed. The repair philosophy requires the entire transaxle to be replaced. My suggestion is that you just drive the car as-is for now since the worst that will happen is that the transaxle will eventually fail, in which case you would need to replace it then. There is no point replacing it now for a four-digit price, just because of the sensor.

DTC B1271 means a problem with the combination meter. If your combination meter (this is the ECU that provides speedometer, fuel gauge, shift selector, and warning lights display) should fail on you in the future, don't be surprised.

DTC B1421 just relates to the air conditioning solar sensor and can be ignored assuming you do not have a problem with the air conditioning.

 

No.

Yes. However be aware that your braking system is impaired, given the presence of VSC and ((!)) warning lights.

What mpg is the car logging?

 

The problem with the brakes is not going to be a mechanical issue, rather the regen is probably not what it could be. That is why your mpg is only 40.

 

Yes. DTC C1310 is logged by the skid control ECU and it means that ECU knows the hybrid vehicle ECU reported a problem. The root cause is the transaxle temp sensor failure.

 

Glad that your Prius works fine now. Other than the fact that the car did not start upon having the failed transmission, were there other symptoms leading up to the event?

 

Hey Mavi, I seem to be having the exact same problem as you described in this post. I am very lost, it would mean the world to me if you replied to this.

1. My red triangle, vsc, and the (!) are also on and on the highway and while slowing down I hear a noise that kind of sounds like a bad wheel bearing(I’m pretty sure wheel bearing is not the issue.) and I am getting only one code, P0A2B. Since you had to eventually replace your transmission, do you think my problem will be fixed if I also replace the transmission.

2. In posts here I read a lot about transmission and transaxle failure. For the same of this Prius, are transmission and transaxle pretty much the same thing?

3. In your update on this thread where you informed us that you replaced your transmission, your final sentence is “drove it 200 miles and it’s back”. In that sentence are you saying that all these lights and issues came back after driving 200 miles on the new transmission?

I am very worried about the issues so it would mean a lot of you got back to me. Thanks in advance!

 

welcome! the post is 2 years old, so if you don't hear from him, try a private message.

transmission/transaxle/ecvt all the same thing.

all the best!