Red triangle, VSC, exclamation sign, check engine light

It looks like something lost communication maybe. Maybe you're 12 volt is not up to snuff that's the first thing you need to check It's telling you you have some wheel sensors that are not reporting to the ECM but that could be because the ECM can't be reported to because of low voltage etc so make sure that is truly up to snuff first or you can be in for a wild goose chase for sure It do make a difference. The PO420 you probably never get cleared up that's your catalyst below threshold It tests itself in the car and it's probably just old and wore out if it was 02 sensors I think you get different codes for those etc The rest of them should be pretty easy to deal with but it really does look like something just stopped talking to something else.

 

You might need tech stream for more detailed diagnostics

 

You can pay attention to what the AutoZone scanner says for the P0 and C0 codes, because those are standardized across cars.

Don't even try to make sense of what a generic scanner tells you a C1 code means; it'll nearly always be bogus. C1 codes are manufacturer-specified and you just have to look them up in a Prius manual to get good info. Everything the AutoZone scanner said about C1259 is bogus for a Prius.



The best reason for looking codes up in the repair manual for the car is that you don't just find what the code means, you find the steps for troubleshooting why you have it and then what to do about it.

Toyota Service Information and Where To Find It | PriusChat

P0420 means the car's self test of the catalytic converter's effectiveness isn't passing anymore, probably because the converter is at end of life. The manual will suggest a couple things to check just to rule out that the test failed for some other reason ... but the test exists to find out when the cat converter is done for, so that's usually what it means when it fails. This code is from the engine control module, and why the check engine light is on.

The C0200 and C0205 are issues with two different wheel speed sensors for the braking system. The manual will also suggest some checks for the wiring between those sensors and the brake ECU; maybe there is some wiring damage at a common point, rather than two sensors both bad. Worth checking, anyway.

Those codes are from the brake ECU, and so are the Prius-specific codes C1259 and C1310, so all those codes account for the VSC and ((!)) lights. The C1259 and C1310 both simply tell you that the brake ECU has been notified of trouble codes in the hybrid-vehicle control ECU. The HV control ECU codes are why the red triangle is on.

The AutoZone scanner did not report what the HV control ECU codes are. Lots of generic scanners are unable to read codes from every part of the car. It will be necessary to use a better scan tool (or go somewhere that has a better scan tool) to find out what the HV control ECU codes are. Here is a thread that reviews some different options and reports which ones can show codes from all ECUs in the car:

Gen2 OBD2 app review | PriusChat

So this car just has a few different problems needing attention.

 

Possibility it is the 12v battery. Do you have a voltmeter to check the voltage of the battery?

Does the car go into READY mode?

Posted via the PriusChat mobile app.

 

0
What happens if you turn on the headlights Do they look nice and bright like normal turn signals work any of that nonsense then I would say if not 12 volt battery is probably dead for the moment.

 

when mine did that, it was the 12v

 

That is good news about the HV battery. I think that some of the lights and trouble codes will return after you drive the car for a while.

Posted via the PriusChat mobile app.

 

If you want to be able to "play" with your Prius (DIY repairs), you might consider getting your own capable scantool. Most generic scanners (including ones used at autoparts stores) simply cannot communicate with most systems on hybrids like a Prius.

Here's a thread that reviews several apps and devices.

https://priuschat.com/index.php?posts/3290690

Posted via the PriusChat mobile app.