Code: P0A90 241

If you can use Dr. Prius app to monitor and clear error codes you'll be able to keep driving it... Here's buyer's guide for device that makes the app work: Hybrid battery diagnostic and repair tool for Toyota and Lexus And changing your transaxle fluid might give a bit of insight into what's going on inside of there.

 

Yes, but I only suggested exploring transmission/transaxle fluid if you want to do DIY diagnosis, or get a second opinion. As far as driving it a hundred miles is if what's failing is minor than you'll be ok, but if that actual stator/electric motor is failing and it's hanging in there but will get worse with use and heat then you could end up waiting for a tow truck far from home. It all comes down to what kind of subcodes you're getting...

It also depends on how much research you've done so you know what you're getting yourself into... If you do a google search for "Prius P0A90 with 241" and read all you can about it, your decision on making the trip will be easier. For example I just did that search and found this thread:

 

i'd be more comfortable with a local mech, if you don't want to go to a dealer. if you go to meineke, might be worth picking up the fluid at a dealer, bringing it with you, and watching the work being done.

it's a simple matter of loosening the fill plug, removing the drain plug, replacing the drain plug and refilling until the fluid comes out of the fill hole.

 

Welcome to PriusChat!!

Here is the workup for DTC P0A90 with INF 241 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Repair%20Manual/04pruisr/05/21bpm/0a90239.pdf

From step 9 : "If the engine over–revs or the reading on the hand–held tester shows DTC P0A90 (INF 241) (HV transaxle
input malfunction [torque limiter slipping]), replace the transmission input damper."

Doubtful if this is the problem at such low mileage (be sure to check the VIN at : Welcome to Toyota Owners ).

Do you hear noises at various speeds or RPM ranges?

 

Sometimes you get codes that are side effects of other problems. Last Summer all the codes pointed to me thinking I had to replace my inverter. Then, right before I started to replace inverter I disarmed high voltage battery pack and realized it was not the inverter but a loose high voltage cable to the pack that was arcing and making the computer think the inverter, not the pack was the problem. Easy fix and still have the replacement inverter sitting on my shelf...

 

What's I suspect is going on here is that when you do a hard acceleration, the trans input damper slips, which the computer recognizes and then shuts down the electric part of the hybrid system so the engine revs up to carry the full load and the engine has hardly any power with out help from the hybrid system, so it feels as though it's in neutral...

 

Well, the damper sits between the engine and the transmission, just where a conventional clutch would sit (and looks a lot like one, other than having no pedal you can release it with). If it is slipping, the engine revs higher because not all of the work it is doing can get to the transmission.

Replacing the damper is something any shop that can replace clutches should be able to do. They have to not be scared of "OMG a Prius with orange wires and things". (And able to read and follow simple instructions to be safe around the orange wires.)

They also have to expect the transmission to weigh 300 pounds, not what you'd normally expect in a small car.