Codes from Techstream- 3000 & 3120

I can't really help with much, but to answer this question, I believe you click on the "snowflake" to the left of those two trouble codes and it will take you to another screen which contains the sub-codes, and possible a whole lot of other goodness.

Sorry I can't be of more help.

 

The subcode is in the FFD (Freeze Frame Data) as what dolj pointed out.

Vincent

 

DTC P3120: your car's transaxle has failed.
Info code 240 means that the generator is locked. Apparently there is a problem with MG1.

 

I don't know what the repair cost will be. My guess would double the amount you cited, for a used transaxle to be installed. Check the market value of the 2001 in your area, it probably will be less than the repair cost.

From my signature block you can see that I sold my 2001 7 years ago. I think that Classic Prius is just one or two steps above a science experiment and its design was immature in many ways.

Hence I am not someone who will encourage you to continue putting significant repair money into a Classic Prius especially if sizable corrosion damage is present. Unless, you like putting money down a rat hole, or working on the car is your hobby.

 

What to look forward to:
Luscious Garage | Blog | Gen 1 Prius Transmission Repair, P3009, P3120, P3125

It would help to know the inverter is working:

• What is the traction battery SOC and voltage?
• What is the 12V battery buss voltage?

Bob Wilson

 

Yes, but I think not all your data are showing. Perhaps you have set the filter at the bottom of the screen to Primary?

If you have saved your data, you don't need to go back to the car to re-read the DTC and take photo. You can just reload the saved files and view the info.

Inf code 240 means Generator locked but in your other thread, MG1 seems to be spinning. Since this Inf code is related to MG1, it is important to show all the data related to MG1.

Vincent

 

You can now buy aftermarket stator rather than new from Toyota.
But the labor is still going to be a sizeable cost.

Here's a recent failed transaxle I saw.

Customer had 220K miles on the car. Walked away rather than fixing.

 

The MG2 stator burning out seems to be something that happens enough to be discussed on here regularly, and for Dorman to develop an aftermarket replacement stator.

In this thread, though, the OP has codes that specifically indicate a problem with MG1, which is reportedly unable to turn. That's a whole other kettle of fish. MG1 is what spins the ICE to start it, so MG1 being unable to spin would certainly lead to a no-start.

I would troubleshoot this into two cases:

1. Is it really true that MG1 can't turn? Easy test: steer all the way to the right, take a few screws out of the right-hand engine under cover and drop that end of the cover enough to see the engine crankshaft pulley. Try to turn it. It's a low friction engine; mine is easily turned barehanded. With the wheels on the ground and not moving, it won't be possible to turn the crankshaft if MG1 won't turn. Or, jack up the right front wheel, pull the shifter out of park, and try to turn the wheel that's off the ground. If it won't turn (or trying to turn it also moves the ICE crankshaft), MG1 is stuck. If you can turn the wheel and the ICE crankshaft doesn't move, MG1 isn't really stuck. If MG1 isn't stuck but you still can't turn the crankshaft by hand, there's really an ICE problem.
2. Or, if the above tests show that MG1 and the ICE can be turned freely, then the troubleshooting turns to why the ECU thinks MG1 is locked if it isn't, and that might end up being more of an electrical treasure hunt involving the MG1 resolver, ICE crank position sensor, associated wiring, etc.

So the first step in distiguishing those two cases is to go out to the car and try to spin some stuff. Doesn't cost much, and then we'll know more.

-Chap

 

User "Orangeboy" in Canada bought a government auction NHW11 that had ripped a hole in the transaxle oil pan. The driver continued until the PSD mechanically welded itself in a solid mass. It was impossible to move the car as the engine was solid to the wheels. He wrote up how he swapped the transaxle in ecomodder.com.

Bob Wilson

 

Just for my insatiable curiosity's sake, in all this towing and dealering that just happened, did anybody try to spin the crankshaft or front wheels to check the spinnability of MG1? Just because, if I remember right, there was this computer code explicitly pointing to a stuck MG1, and not at all to an MG2 stator?

-Chap