04 prius. On the dash red triangle light there is a check engine light and tire pressure gage light on. The car drives but loses power and very sluggish. Changed 12v that wasn't the problem .the night before this happened we were driving down dirt roads .everything was fine came out next day and these lights were on and car was acting funny...never had a problem before...any suggestions ...I'm at a loss
Welcome. It could be one of a number of things. You will need to get the codes read by someone with access to a scanner that can read Prius codes. Although they are not expensive to buy, you probably don't want to wait for one to be delivered. Your best option appears to be to take it to a Toyota dealer and have them read the codes for $100 or so. Post the codes here, and there will be plenty of knowledgeable people willing to help.
Welcome! +1 to what @davecook89t said. No one knows anything from that light other than that your car has a problem. To find out what it is, you need to use a Prius capable code reader, which most regular shops do not have. Also, I suggest you click the "Report" button under your signature line and see if a moderator will move this to the Gen 2 Prius Care, Maintenance and Troubleshooting forum since this is the forum for questions about the website.