Figure this one out!

Your HV battery (the big one behind the back seat) is dying and will soon be dead.

Prepare for the repair if you dare.

 

Its all supposition till the codes are pulled. You have much unhappiness there with both Hybrid and Engine codes being registered.

But like Jad said get ready....and don't let the wife take it till you figure it out. Cause next time it won't get her back home.

 

is the battery icon erratic at all?

 

when you find out let me know my 05 did the same gave me a code for a bad #9 battery module(# 17 and 18), replaced it and still have the same problem..

 

just rebuilt mine after pulling codes with techstream, still have the same problem..more like charging problem from the CVT

 

As in a previous post all is supposition until the codes are available, but my first port of call would be to clean the throttle body, and MAF sensor. The throttle should be turned by hand against the spring with no feeling of roughness or sticking.

John.

 

If you need help in the Tx panhandle area, I've got 2 code readers and Techstream available...

 

12.1 is low, i would check it under the hood in the morning.

 

If your time is limited, the first thing you want to do is have the codes read, so that you don't waste any more of it. In general, you should have them read with a scanner that can read all Prius codes (this is not always true of scantools used by places like AutoZone, and a scan that doesn't show the full set of codes also consumes your valuable time.)

There is a trap a lot of new PriusChatters fall into, and it works something like this: car starts misbehaving; owner immediately starts thinking it must be the traction battery or inverter pump, or something else Prius-unique. Why? Because when people talk about Prii, a lot of the time they are talking about the things that are different from other cars. The owner might even post a new thread on PriusChat (with no codes) and invariably a few responses will also pile on to the battery idea, even if there wasn't anything in the original description to suggest a battery problem, and that wastes even more time. It almost takes a deliberate reminder that every Prius also has a gasoline engine, and nobody here is too young to remember that gasoline engines run roughly sometimes, and need to be fixed. It just gets left out of the conversation, because that's just something the Prius has in common with other cars.

Now, there is one way that engine trouble in a Prius feels different from engine trouble in other cars, and that's the way the Prius will try to keep moving you down the road electrically even as it is trying and retrying to keep the engine running. It feels rather odd, and it can be misleading because it's not the same as lurching straight to a stop in some other car. (It's also worth paying attention to when the car feels like it's doing that; if the engine doesn't smooth out eventually, the computer does give up, and then you are on the side of the road. If you are feeling stumbles and restarts, you can plan your route and speed to avoid, say, merging onto the interstate, until you are sure things have smoothed out.)

-Chap

 

Have you cleaned the MAF sensor yet? I've experienced what your describing several times and that's always been the problem.

 

If the lights came on, it will latch a code/s. Just get it read and fix it. As much time as you have wasted already you would be done.

 

Old spark plugs can make the engine sound horrible and run rough.

Plugs are supposed to be changed at 120k miles. I like Denso Irridium plugs. Don't forget to check your dipstick too. Most Prii that come in my shop are low on oil if they have over 120k miles on them. Some have less than 2 quarts in them.

 

a month old? this guy will never be back. he'll take his 38 mpg and like it.

 

...well if he comes back he should check his HV Batt fan for clogs and I wonder what gaso brand he is using. He should go TopTierGas.com...per Paul above we've had a few folks replace plugs poorly and they get loose and rough engine results.