2013 Knocking, rough idle, sputtering, cylinder misfire, improper air fuel code!

It seems like you may have a blown head gasket. These cars are prone to it at higher mileage.

 

Have you ever cleaned your EGR system? That would include the EGR cooler.

 

Sure does sound familiar; cars have been having misfires as long as there have been cars, even cars without EGR and cars without failed head gaskets. Not every headache is a brain tumor. The three most basic things to check are ignition, compression, and fuel.

Sounds like you've pretty much covered the ignition angle. If you next put the car in front of a blindfolded mechanic and didn't say anything special about it, the fuel injectors, fuel pump pressure, and compression would end up getting checked.

We had the member astrolink about ready to ditch the car before checking the injectors.

If you have actual trouble codes, it might be helpful to post them here; there can be more than one code having to do with air/fuel ratios, and it can matter to know which ones are set.

 

I only got almost 160K on mine. This prius is the longest car I have ever owned with more miles than any other car I have ever owned. 230K is impressive to me, but others here may say it still has lots of life it it. I hope to get to at least 200K. I have heard of others getting almost 300K supposedly. To me if the costs of repair start to become more than what the car is worth, it is time to eject. Just my 2 cents. Good luck and wish I could be more helpful.

 

Have you cleaned your EGR system (the cooler, valve, pipe and intake manifold)? 160k isn't a lot for the car, but it is a lot for the EGR system, and a clogged EGR can kill the engine.

 

For $800 at dealership service department, I'd be REALLY sceptical they're going to cure your car's woes. Head gasket repair (with a machine shop go-over of the head), through an independent shop, might run $2500~3000.

A thorough cleaning of EGR and intake, dealership probably wouldn't even touch, preferring to just replace, for around $1500 (roughly $900 in parts).

Read up here and DIY clean the EGR and intake (maybe install Oil Catch Can too), get independent shop to do head gasket? Or just trade it, for say $500?

 

oh yeah, check out this thread for all that I did
Getting ready to do EGR/manifold/throttlebody, etc. cleaning-have lots of questions-long post-sorry | PriusChat

since I did the work I am having a check engine light problem. I started a new thread here

Check engine light came on this morning-P0101 | PriusChat

If you have any ideas please let me know in that thread as I am all ears.

 

unfortunately the dealer cannot guarantee their diagnostic is correct. So if you spend $800 and the problem still doesn't correct itself, you still have a high mileage car and spent $800 for Toyota's efforts in fixing it.

They are essentially throwing you a bone, if quoting you $3000 to fix a head gasket, you will surely say no, but giving you a $800 option they can make some money and still have you on the hook for something else if it doesn't fix itself cause you spent $800 and don't want to give up now.

The smart money would be not to put $800 on such a high mileage engine and possibly put it towards a lower mileage engine replacement that will surely correct the issue at hand.

 

Move on to another car. The old Prius served you well for 7 years. Unfortunately, there was a design flaw, which only became apparent late.