2006 Prius error codes 3190 P0171 P0420

You might want to start with cleaning the throttle body and the MAF (mass air flow sensor. So up the oil that has pooled in the intake while you are in there.

Make sure you have a good air filter as well.

You can use carb cleaner for the throttle body. But be sure to use MAF sensor cleaner for the MAF sensor.

Try these things and then report back.

After these things you could could try replacing the MAF with a good one. (not done piece of garbage non-American one).

If you have misfire codes you could also check the condition of the spark plugs and reply as needed.

 

your car is 12 years old and burning a lot of oil (if its below the stick the guy you bought it from clearly knew its worn out) and its clogging the cat convert.. no point replacing it the motor needs to be rebuilt... you will only destroy the new cat.. demand your money back or sell it but don't waste more money on it.. its not worth the cost of a rebuild and a used motor will have the same problems.. sorry but he screwed you. you said hes not comfortable diagnosing the car tells me he isn't much of a mechanic .. the gas engine side of the car is the same as any other car made.

 

no you would not always smell it,you might see smoke from the tailpipe but not always. take a paper towel and run it around the inside of the tailpipe if it has a black residue on it, the car is burning oil... if you dont see it leaking out of the car the only other place is out the exhaust, these motors start burning oil in the low 100,000 mile range.. you can read dozens of posts here about it.. some burn a quart every 3 to 600 miles.. so the money you save in gas you waste in oil or if you dont check it weekly you will burn up the motor. your best bet is try to get your money back from the seller.. your motor will need new rings, head gasket, ect, ect, ect..then you have the other expensive problems to look forward too, ABS pump $3400, AC compressor $1800, digital dash dying $1000 its just not worth it.. old prius' are ok if you can do the work yourself if not a lot of cars today get near 40 mpg so they are the better deal. cheaper repairs and any shop can work on them.. btw all of the over the counter additives dont work so dont waste your money on them either, there is no magic solution, the motor is just worn out.

 

Most of Priuses don’t start burning oil that early. And likelihood of those problems is pretty small and they shouldn’t cost that much to fix especially if you can use cheaper shop and maybe even used parts. And no matter what car you end up getting there’s always a change that something will break.

 

my 2008 has 157,000 miles goes through a quart and a half between changes..(I change between 3500 miles and 4000)
major repairs to date include
ABS actuator ($3400 but fixed under extended warrantee)
rebuilt HV battery pack due to 2 leaking modules (rebuilt myself about 15 months ago)
digital dash failed (Not covered under extended warrantee, happened 10 weeks past cut off date) bought used one from salvage yard, replaced myself... dealer well over $1000
inverter cooling pump (recall item)
HID ballast
4th 12 volt battery
the car has not been abused just normal daily use..
so if you are not having problem you will sooner or later

 

Study with one test subject just isn’t nearly enough to draw the conclusions. And for the posts from people having problems in their Prius you have to remember that people how don’t have problems don’t post about that. And people how don’t have problems are less likely to even be on forum like this.

And to fix these possible problems you could go to some other shop that could then even use used parts. That would get the prize a lot lower.

And anyways the real question is the cost difference of driving with a used (gen 2) Prius or some other car for the same prize (and other qualifying factors (like space)).

 

the bottom line is the repairs on an older prius done by a qualified mechanic with new parts far exceeds the money saved on fuel of a regular car of the same size year and miles.in most cases it exceeds the market value of the car itself. I was ready to scrap mine when the ABS problems started and the dealer gave me a hard time on the free repair , my cars value is less then the $3400 they spent to fix it, I asked what they would give me on trade in and they said $2400 AFTER the repair.a used car is worth "$X" no matter whats been done to it, its only worth what someone is willing to pay for it.. book value means nothing..so when the repairs cost more then 50% of what I see the cars selling for I dump them, its just a car

 

When a car needs major repairs there may be no trade in value.

 

Theoretically ABS-pump could brake on any car and the amount of work would be pretty much the same. Or some other part. Why is it so much more expensive to fix the Prius?

But yes to me 2400$ just sound amazingly low value for less than 10 year old car.