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2010 Toyota Prius turned off #4752415
05/09/18 09:27 PM
05/09/18 09:27 PM
Joined: Aug 2009
Posts: 675
CA
Gito Online content OP
Gito  Online Content OP
Joined: Aug 2009
Posts: 675
CA
2010 Toyota Prius (HB IV) with 265k miles.

Friends Prius turned off while driving at approximately 70 mph on the freeway in 90 deg weather (Los Angeles).
He was able to coast the car off the freeway exit.

He remembers something popping up on his dash indicating a problem but doesn't remember exactly what light turned on.
The car eventually started again and it was moved a short distance (from the street to the garage)
Apparently the light that had previously turned on did NOT turn on again when the car was moved into the garage.

He left the car to get it checked out.
He later got a call from the owner of the shop and he indicated that one of the water pumps was leaking but did NOT address why the car had turned off on him while driving.
Apparently there are two water pumps (one for the inverter and one for the engine).

Question?
Could a bad water pump cause the Prius to turn off?
My friend is now considering towing the car to the dealer to get a complete diagnostic.
We are thinking that it might be a bad battery cell but these cars are little more complicated for us.

Any advice is greatly appreciated



Re: 2010 Toyota Prius turned off [Re: Gito] #4752430
05/09/18 09:44 PM
05/09/18 09:44 PM
Joined: Mar 2017
Posts: 5,718
...
PimTac Offline
PimTac  Offline
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Posts: 5,718
...
Iím not familiar with the Prius system but most new cars these days have a survival mode or limp mode that goes into effect if it senses permanent damage might occur. You mentioned a water pump. Perhaps the system shut down to protect the system from overheating ?


2017 Mazda CX-5 GT.

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Re: 2010 Toyota Prius turned off [Re: Gito] #4752452
05/09/18 10:08 PM
05/09/18 10:08 PM
Joined: Jan 2009
Posts: 6,274
New England
gathermewool Offline
gathermewool  Offline
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Posts: 6,274
New England
Obvious question: plenty of fuel in the tank? If your friend ignored a warning, might he have also ignored other symptoms that we and the shop need to help trouble-shoot?


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Re: 2010 Toyota Prius turned off [Re: Gito] #4752463
05/09/18 10:18 PM
05/09/18 10:18 PM
Joined: Aug 2009
Posts: 675
CA
Gito Online content OP
Gito  Online Content OP
Joined: Aug 2009
Posts: 675
CA
Tank was full. He thinks that he read something like "hybrid malfunction" on a dash light

Re: 2010 Toyota Prius turned off [Re: Gito] #4752521
05/09/18 11:27 PM
05/09/18 11:27 PM
Joined: Sep 2015
Posts: 5,945
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
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Posts: 5,945
Kalifornia Kollective
Inverter overheating would do it. Safety mode to prevent a fire ...


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: 2010 Toyota Prius turned off [Re: BrocLuno] #4752525
05/09/18 11:35 PM
05/09/18 11:35 PM
Joined: Mar 2016
Posts: 1,465
Western S.C. since 1996
CR94 Offline
CR94  Offline
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Posts: 1,465
Western S.C. since 1996
Originally Posted By: BrocLuno
Inverter overheating would do it. ...
Inverter overheating due to failure of the inverter coolant pump would do it---among other possibilities.


2011 Toyota Prius now at 93K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K
Re: 2010 Toyota Prius turned off [Re: Gito] #4752535
05/09/18 11:49 PM
05/09/18 11:49 PM
Joined: Jun 2005
Posts: 11,402
Santa Barbara, CA
bdcardinal Offline
bdcardinal  Offline
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Posts: 11,402
Santa Barbara, CA
It happens on the Escape Hybrids. A wrench light comes in and the vehicle goes into limp mode. Sometimes it is the pump, sometimes it is the fans, sometimes it is the blend door actuator for the traction battery.


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Opinions expressed are my own.
Re: 2010 Toyota Prius turned off [Re: Gito] #4752537
05/09/18 11:52 PM
05/09/18 11:52 PM
Joined: Aug 2004
Posts: 20,022
CA
The Critic Offline
The Critic  Offline
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Posts: 20,022
CA
Need to scan the car before jumping to any conclusions.

This does sound like an inverter failure of some sort. Some (not all) inverter failures are covered by the ZE3 warranty extension campaign, which is 15yrs/unlimited mileage.


2011 Toyota Prius - 173k - Various 0W-20 (Brew)
2007 Honda Accord 2.4 - 131K - Mobil 1 EP HM 5W-30
Re: 2010 Toyota Prius turned off [Re: bdcardinal] #4752577
05/10/18 03:54 AM
05/10/18 03:54 AM
Joined: Oct 2012
Posts: 4,765
Taiwan
Ducked Offline
Ducked  Offline
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Posts: 4,765
Taiwan
Originally Posted By: bdcardinal
sometimes it is the blend door actuator for the traction battery.


...sometimes I think I need to learn all this new stuff. Then I think, wait...maybe it'll go away. Or I will.

Last edited by Ducked; 05/10/18 03:54 AM.
Re: 2010 Toyota Prius turned off [Re: Ducked] #4752706
05/10/18 08:23 AM
05/10/18 08:23 AM
Joined: Jun 2016
Posts: 3,205
MN
oil_film_movies Offline
oil_film_movies  Offline
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Posts: 3,205
MN
Originally Posted By: Ducked
Originally Posted By: bdcardinal
sometimes it is the blend door actuator for the traction battery.
...sometimes I think I need to learn all this new stuff. Then I think, wait...maybe it'll go away. Or I will.
He's just talking about the servo motor & housing that mixes vent air & AC-cooled air directed to the hybrid's big battery. Almost all cars these days have these "blend door actuators" to mix outside vent air with AC-cooled air for passenger climate control too, so its like that.

But the blend door thing is not what is causing the problem here. Why? ---> Clue: Water pump leaking. Big clue there. That means the power electronics wasn't being cooled enough due to coolant loss, it overheated and shut down to prevent further damage. Another clue: He said it started up and ran after sitting (cooling down) for a while, so, again, that points to overheating due to coolant loss.
Should be codes stored, a log of past events you can read from a scan tool.

Last edited by oil_film_movies; 05/10/18 08:28 AM.
Re: 2010 Toyota Prius turned off [Re: Gito] #4752943
05/10/18 11:52 AM
05/10/18 11:52 AM
Joined: Aug 2009
Posts: 675
CA
Gito Online content OP
Gito  Online Content OP
Joined: Aug 2009
Posts: 675
CA
Mechanic just notified my friend that they saw no leaks but they got code P261B, main water Pump.

Re: 2010 Toyota Prius turned off [Re: Gito] #4752952
05/10/18 12:02 PM
05/10/18 12:02 PM
Joined: Aug 2004
Posts: 20,022
CA
The Critic Offline
The Critic  Offline
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Posts: 20,022
CA
Hopefully the head gasket survived.


2011 Toyota Prius - 173k - Various 0W-20 (Brew)
2007 Honda Accord 2.4 - 131K - Mobil 1 EP HM 5W-30
Re: 2010 Toyota Prius turned off [Re: Gito] #4752957
05/10/18 12:08 PM
05/10/18 12:08 PM
Joined: Aug 2009
Posts: 675
CA
Gito Online content OP
Gito  Online Content OP
Joined: Aug 2009
Posts: 675
CA
We are hoping that code P261B points to something other than head gasket failure

Re: 2010 Toyota Prius turned off [Re: Gito] #4752980
05/10/18 12:30 PM
05/10/18 12:30 PM
Joined: Aug 2009
Posts: 675
CA
Gito Online content OP
Gito  Online Content OP
Joined: Aug 2009
Posts: 675
CA
Friend also says that he had mice in his Prius and has a bad feeling that the code might point to that.

Please advise

Should he just take it to the dealer?

Re: 2010 Toyota Prius turned off [Re: Gito] #4752981
05/10/18 12:33 PM
05/10/18 12:33 PM
Joined: Aug 2009
Posts: 675
CA
Gito Online content OP
Gito  Online Content OP
Joined: Aug 2009
Posts: 675
CA
Code P261B also points toward bad wiring.

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