2001 ICE Stalls shortly after starting.

It sounds as if your ICE isn't really starting. You can be fooled because your Prius doesn't have a conventional starter, so you don't have that conventional starting sound. Instead MG1 just spins the ICE right up to operating speed, but then the computer allows it around 15 to 20 seconds to actually start, i.e. reach the point where the MG1 power could be cut and the ICE would keep running on its own. Sounds as if that's what's not happening for you. The roughness you're noticing is probably connected with the ICE's inability to start.

You'll really want the diagnostic codes as a start for solving the problem.

-Chap

 

Time the length the engine "runs" with a stopwatch. If it is ~8 seconds (not 20) then dies the engine is not starting. Have the car scanned with Techstream at the dealer. get all the codes/subcodes and share them here.

If engine oil was recently changed they may have overfilled it, check intake manifold for a "puddle" by looking through throttle body with butterfly open (remove air cleaner first). Too much oil can prevent a Prius from starting.

If you attempt to start too many times you'll drain the HV battery then you'll be in a bit of pickle.

 

I had exactly the same issue when I disconnected the 12 volt battery to change out the steering wheel. It's nothing more than the computer getting confused. solved the problem by quickly shifting to neutral once the engine started. I cleared the check engine light with my code reader and after a couple of minutes all the bad lights went out and it operated normally from then on. Do a search and this is a common problem with gen 1 Prii. There's an ECU upgrade of some sort, but it's not that big an issue really.

 

Well thanks very much for this, after reconnecting the 12v battery on our 01 I had this same issue where the engine sounded like it was starting but quickly sputtered off and all sorts of warning lights came on. This paragraph above is the only thing I found online mentioning a solution. After quickly shifting into neutral the engine managed to stay on. The warnings and codes remained after restarting it again, since I have no way to clear them. Maybe they will disappear eventually.

 

Sounds similar to the P3101 and P3191 problem. Clean the throttle body then clear the codes and try to start again.

 

I agree: Cleaning Prius Throttle

Bob Wilson

 

Well.... I having the same issue. I have a 2001 with a remanufactured hybrid battery and a new throttle position sensor that has run fine for months and now this. When I put it in neutral it shutters like the car is going to detonate and explode. I don't have a scanner or the ability to do anything with info on the codes except share with this forum. Maybe I'll get some codes up here soon.

 

The issue is the fuel gauge is reset when u disconnect auxiliary battery. If you don't have at leat 3 gallons the car will sometime think it's empty and kick out a p3191 code. Similar to having one bar of fuel and putting in one or two gallons and not seeing an increase. Can also happen if you shift into gear before fuel gauge registers that it has gas. Fill tank, disconnect battery to reset codes then try again to start without shifting to any gears.