Is it worth saving? P0A0F code!

The hv battery is not too low to turn it over if the engine is "thumping and clanking". The battery is on life support and has been for months.

But it's now just part of a repair vs junk decision because of this.


Sorry but that is a blown engine. Odds are high the aluminum head and block are warped significantly allowing this oil and coolant milkshake to run wild throughout the engine.

Most likely there is a bent connecting rod or worse.

I would not even buy a gasket set before you teardown this thing. You won't need gaskets on the replacement engine should you go that route.

 

You don't need an engine to reverse.
You may have a great high-voltage battery, but a really bad engine.
Don't try to start it. Take the engine apart first and assess the extent of the disaster.

 

Has the car set a P3000-389 code and refused to even try to crank? Or is "the battery is too low" a judgment you are making for it?

 

The message of the P0A0F-238 was that the engine mechanically couldn't be cranked. That's a different issue, completely unsurprising when the cylinder is filled with liquid.

It now remains to be determined whether the cylinder full of liquid was the only reason the engine mechanically couldn't be cranked, or something mechanically also broke at the transmission input. If you are now able to easily crank the engine by hand with the coolant escaping through the spark plug hole, then a quick cranking test by the car will give the answer to this question.

In a car with a manual transmission there'd be easier ways. You could just put the tranny in gear with the wheels on the ground and confirm that you can't turn the engine by hand anymore (or the car moves when you do). That would prove the input shaft is still intact. But the way a Prius transmission is built, it will only freewheel in any test like that. The only ways to check the input shaft are to let the car try to crank, or to take the transmission off and look.

 

Exactly. That is what happens when we are talking about the engine and hydrolock.

You might be the first if the transaxle literally broke. A few have damaged the spring loaded damper attached to the flywheel (no transaxle removal required).

A few have changed a functioning transaxle due to bearing noise. Some of these show metal in the transaxle oil.

A very few have had winding shorts in the transaxle which coded as a high voltage hybrid drive problem but did not lock up the transaxle.

 

We've got pictures on PriusChat of snapped input shafts. Wouldn't be the first.

If the torque damper coil springs get beaten to smithereens first, then the impulse torques delivered to the input shaft become really high.

But the code could also simply mean that the engine could not be cranked and the ECU gave up, and the transmission is undamaged. That would be nice to find out.

 

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