Check Engine Light, OBDII Scanner gives these codes...

Best plan is to look them up in the Prius repair manual (more info). Any code that starts with P1 is a manufacturer-defined code that can mean anything in one car and flat out anything else in some other make/model, and when you google on the internet you just get all of that glommed together.

Next best bet might be to confine your searches to site:priuschat.com and then sort through the hits you get, to pay attention to the ones where somebody has looked the code up in the manual, and knows, yeah, that code on a Prius is not about the throttle or pedal or accelerator switch, and try to skip over the posts that are just from other people who also glommed together a lot of google hits.

 

Let us know when you figure it out

 

always start with the 12v health. what code reader are you using?

 

So lets go with the assumption that the scanner you're using is communicating and interpreting correctly (because that's not always the case)

50% of the time, when someone looks up a Prius code on line (ie Google) they get a eyeful of BS that has nothing to do with the code. So what @ChapmanF is trying to say is: DON'T use Google. Limit your search to this website, where most people have actually discussed the CORRECT diagnosis and the appropriate solutions.

@ChapmanF is saying that any code that starts with P1 may not be identical from one manufacturer to another, so Google is full of a hundred different definitions for that code and it will likely send you on a wild goose chase. And the Gen2 repair manual is available on line for free. There are multiple links in multiple threads on the forum. I'll find one and add it to this post to make your life easy.

Service Manuals - Google Drive

Took me almost 2 minutes to find and add that link...I work cheap, just PayPal me 10% of what you thought a service manual should cost.

 

Hey, you found out you shouldn't google that, which already is more help than that, as TMR-JWAP has explained.

Also, even if you hadn't been given a free link to the manual, even the $20 subscription on TIS seems like it beats "a few hundred bucks", doesn't it?

The kind of help that gets you better at what you want help with is the best kind to get from a community forum.

You can refer to a chart like this one to see what categories of trouble codes you've got. For example, you see that P0 codes are SAE defined (standard across car makes). So if you had a P0 code and you googled it, you'd at least stand a chance of getting helpful results. A P1 code? not so much.