P3000 DTC Code in Techstream History

I would just clear the codes and as long as it does not come back then I would not be concerned about it.

If it does come back then take it to the dealer.

 

Whenever your Prius throws a DTC, it's stored inside the Prius indefinitely, until you clear it with Techstream. When you clear the codes, Techstream saves these to your PC as a History file. You're seeing a code your Prius once had, but it no longer has it. So there is no problem.

All you know is that once the car threw this DTC, and that you cleared the code and it hasn't come back. And that means nothing is wrong.

The DTC could have been thrown for any reason, like maybe a cable was disconnected during maintenance and subsequently reconnected. If the error appears again later, then maybe there's a problem, but it isn't there now.

 

Good morning everyone, I have found on the prius 3 p0303 code, I did replace spark plugs and coil of the third cylinder, but the problem is not solved, they checked the compression cylinder which is perfect, tell me that to replace injector, there already happened such a problem?

 

That error is most likely a fuel injector. They are expensive. If it was my car, I would look for a used one from a wreck.

There is a thread here on PriusChat which covers this pretty well:
Misfire detected- P0300 p0303 set | Page 2 | PriusChat

 

I ordered injector when he comes I will let you know how it goes