Prius base 2007

Any trouble codes?

might just need plugs, injectors, throttle body cleaning, etc

 

Nobody can make that call but YOU.
But if you are still on the factory original hybrid battery, the odds are that another major expense is in your future.

I suggest that you get a diagnostic service at a Toyota dealer and expect BAD news.
But it could be a lot of less major things too. Like plugs or injectors.
Any "trouble" lights come up on the dash ??

If it is a major engine fault, like a head gasket, I certainly wouldn't consider dumping that much money into a 15 year old car.

 

Head gasket on a 1NZ I mean it is possible on any internal combustion engine this engine is not a popular candidate for that type of thing unless extremely abused which mine is and hasn't even come close to a head gasket failure I would be looking at plugs coils the throttle body cleaning of course stuff like that Head gasket would be a last ditch diagnostic when you pull your plugs you should be able to tell if you have a head gasket leak pull them picture them label them but I doubt it My 2007 is my work vehicle If it blew an engine Yes I would probably change it The one NZ is a great engine. Unlike it's ZZ counterpart through 15 or 16 but whatever I need my 0709 second gen Prius on road and generally I'll do what it takes to keep it so an engine for this model is relatively cheap they can last 600k so when I replace it everything on the car will be falling off by the time I'm done with it so my money's out of it regardless there's no way you're going to get a cheaper car to operate today no matter what you buy an '09 Prius and better condition okay that would do it

 

How much is that much money One NZ can be had from the JDM importer sometimes for $800 going to spend about eight to get it shoehorned in so 1600 bucks on your 15-year-old car that you've done all this other stuff too Not such a bad deal or you can go out and spend $8,500 on them whatever and start all over always options.

 

glad you found the problem and it wasn't too big of an expense.

all cars suffer wire chewing from rodents, but prius is especially attractive to them due to the veggie based manufacturing

 

Techstream can give you some information, but yes, it is probably just going to show you 3 working sensors and one that has gone to the great beyond. It won't tell you which wheel it is though. While this situation can be fixed, in terms of cost effectiveness, a tire pressure meter used regularly will get you 99% of what the TPMS system is for. What it won't get you is a warning if you have just run over a nail and a tire is going flat while you drive.

 

Yes, probably.
But first ADD 3 to 4 PSI to all 4 of the tires and drive it a bit.
Just to be sure that it isn't a minor calibration problem.

 

There is a reset button for the TPMS. Set the tires manually to the correct pressure and then reset. If the battery is dead in one it won't help, but if it was a calibration problem it should fix it.

This is for a gen 3, but I think it was the same on a gen 2

Reset Tire Pressure Monitor System? | PriusChat

 

The second part there really tells you what the "SET" button does. It is for telling the system "see the pressures I have in the tires right now? Remember those are the pressures I want." It will then remember those pressures, and light the warning if any tire goes so many percent below the remembered pressures.

So the main times you'd have any reason to press it are when you've changed your mind what pressures you like, or, if you run different pressures front and rear, at tire rotations after you've adjusted the pressures for the ones newly front and newly rear. (The car remembers the pressures you want according to which transmitter, not which corner of the car.)

Beyond that, it isn't a magical reset-things button. There isn't really any calibration to do. The car doesn't second-guess what the transmitters say the pressure is. You can see what the pressures are with a scan tool, and if one disagreed with a good gauge, that would just mean a bum transmitter. But I haven't seen them go bad that way; mostly they just conk out when the battery is done for.

There is a difference in what the warning light is telling you, in whether it comes right on solid, or blinks for a minute or so and then goes solid. So that's worth mentioning, in questions about it.

 

TommySI,
My 2008 had very similar issues. 1 TPMS sensor died and then 2 months later a second. I just bought all 4 new ones and had them replaced when I got new tires at Wal-mart. Once all the new ones were in they reset the system with the button under the steering console and no more issues. That was 1.6 years ago...still going strong.

 

The button is under the steering wheel. My understanding is that all it does is tell the car "whatever the TPMS are reading now are the right pressures". Driving around isn't needed. (My understanding is theoretical since one TPMS is out, so the button is useless.)

 

The button under the dash won't do anything for this problem. There is no "calibration" process. The Prius can't "learn" what sensors are on the car- it has to be "told".

What sensors did you buy from where? What exactly did the shop do?

If you get a sensor from from Toyota (or equivalent), it's "correct" for your Prius but the car doesn't know that it's there. Every sensor has a unique ID number, and that number has to be entered into the TPMS ecu on the car with a scantool (or fancy TPMS tool) via the OBD port.

Many aftermarket sensors are "universal" and must be programmed with a special tool before installation. This tells the sensor what frequency it should use for a given year-make-model. And it creates the sensor's ID number. Which have to be entered into the ecu.

If something wasn't done correctly, it can take a few miles before the TPMS system realizes that it hasn't heard from one or more sensors and turns the light on.



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