2008 Prius stopped at intersection and was done....

probably need techstream, or at least dr prius or hybrid asst.

 

Are you sure the engine is actually running and not attempting to start? It can be hard to tell.

 

Could wait for Techstream, but that app has given a pretty good list of codes from several different ECUs, so it's not like one of the readers people sometimes use that show the engine or brake codes and nothing else.

The P0A0F indicates the engine didn't start. The P3190 is a more understated way of saying it, but there appears to be an engine issue here.

The trick is to find the engine issue and get it to successfully start, before using up all the charge in the traction battery trying to start it.

 

When the 12v battery is replaced, or if 12v power is lost, ALL the ecus in the car go back to default values.

This means the HV battery, regardless of actual SOC, will temporarily show about 60% until it recalibrates itself.

It also means that any LEARNED VALUE, like throttle position, returns to it's default, so any learning it did due to wear and tear, crud buildup, etc, is lost.

I have seen engines fail to start because the MAF is dirty, the throttle body is dirty, etc. Clean the MAF sensor and temperature bulb, clean the throttle body so these components are as close to original as possible. This will often cure the 'fail to start' problem.

These small procedures are in plenty of threads on the forum

When I clean a throttle body, I remove the air filter housing, remove the MAF sensor, use a screw driver to hold the throttle plate open and scrub every inner surface with a stiff toothbrush soaked in TB cleaner. Then spray it and do it again.

If you want to help the car start, after doing the cleaning, the first time you try to start it, shoot a bit of starter fluid in the TB.

 

+1 to TWR-JMAP.

It sounds as if the Internal Combustion Engine (ICE) on your car doesn't run. Could be "goop" buildup in the throttle body (combined with some buildup on the 2 sensing "wires" inside the MAF sensor, could be that you actually are out of gas, could be lots of things.
You need to DO something to affect operation (such as cleaning the MAF and TB, and/or adding gas to the tank), or perform some tests (such as checking fuel pressure) before attempting to start the car (ie, going to "ready" mode).
The car uses power from the HV battery when it tries to start the ICE- you may have run it down too much already, and few people have the means to charge it.

Posted via the PriusChat mobile app.

 

Not much history on the car here other than no problems for a couple of months. Hard to diagnose.

 

the exact same thing you are describing happened to my 06. Stopped driving on the road. would only go in neutral or park, not drive. every time i turned it off and back on the engine would try to start but then wouldn’t. Cause was an oil change at an express place two days prior putting way too much oil in. I had towed it to toyota service department and so i don’t know what codes popped up. have you had an oil change done recently?Id suggest Checking your oil dipstick! I now do all my changes myself to avoid it

 

Or maybe the oil all drained out here.

 

12.02 volts indicated for the 12 volt is pretty lackluster.

 

By the same token, it's plenty for practical purposes, especially considering it's reported by a connected scan tool, meaning the ignition is on.

After solving the engine no-start issue, the OP will have time to worry about luster.

 

The High Voltage hybrid system is (electrically) separated from the rest of the car (which uses 12V). However, all of the computers in the car (the "brains") use the hybrid system (the HV battery, inverter, and motor generators, - aka the brawn) to actually do things like spin the Internal Combustion Engine, or to move the car.

The hybrid control ecu will command the inverter and motor to spin the ICE at 1000 rpm for up to around 10 seconds when it attempts to start the ICE. It sounds as if the engine is running then stalls- but it probably wasn't ever running.

Again, if the throttle body bore around the blade has sludge built up (and cutting off airflow at "idle"), or the fuel pump doesn't work, or any of a number of things has gone wrong (that the engine ECM can't detect)- then the ICE won't run and you end up trying to start several times and discharging the HV battery.

You may need to either look into getting a grid charger for the HV battery, or tow the car to a hybrid shop. Some may have the ability to charge your HV battery- others (including most dealers) will likely only replace the HV battery.

Posted via the PriusChat mobile app.