Red Triangle Of Death, High Temp Light, Coolant Overflowing To Reservoir | Prius Diagnosis & Causes

[@EyeOnAiman]

Here are the #ᴬᴰlinks to tools, parts and accessories you may need to perform this repair: 1. amzn.to/41nDVla | GELUOXI 16670-21010 Coolant Flow Control Water Valve Replacement for 2004-2009 Toyota Prius 1.5L Hybrid 2. amzn.to/41nywdW | Zerex Asian Vehicle Red Silicate and Borate Free 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 3. amzn.to/3ZFMyXd | PEAK OET Extended Life Red/Pink 50/50 Prediluted Antifreeze/Coolant for Asian Vehicles, 1 Gallon 4. amzn.to/3Vp9ojq | Milwaukee 2457-20 M12 Cordless 3/8" Sub-Compact 35 ft-Lbs 250 RPM Ratchet w/ Variable Speed Trigger 5. amzn.to/3D4LOCa | G9020-47031 Engine Electric Inverter Cooler Water Pump Assembly for 2004-2009 Toyota Prius 1.5L Or Click on Amazon link here and search for what you need: amzn.to/3D1T2GQ

[@TonyHendren]

Aiman, Thank you, thank you, thank you. My (ex) mechanic had my '08 for FIVE days and still didn't get this air bubble problem fixed. My awesome wife found your videos on the subject and I fixed it myself in one afternoon. Along with your vids and a tune up it has never run better since I bought it two months ago. Thank you and God Bless.

[@alixandria7346]

I have a Toyota hybrid I noticed I was very low on coolant and barely anything in my reservoir...just recently bought the car will that alert come on as well? I will put coolant in both ...

[@MikeyMystery45]

You're a really smart dude. I liked your video. You made me aware of the issue on my car and it wasn't even this model of car. Thanks dude. I'm going to go look up how to bleed the air out of my cooling sysstem now.

[@stveichman3329]

Around 2:57 in video you refer to Electric Water Pump, Gen 2 has a Pulley operated Water PUMP.

[@eventurapr]

I have exactly the same problem. Thank you for your advice!

[@mahtabuddinsakhizdad4408]

Thank you for this video, my prius plug in has exact problem, I changed the termostat and still has the same problem. What did do for this problem if you help me please 🙏. Thank you again

[@fantscher]

I guess I have air in the system somehow. I drove the car for several hours at a time (just got it a week ago, 2008 Prius) but never with heat on. I actually had A/C running most of the time. I think when I set my temperature yesterday it might have been set higher than outside, so I guess water got directed to the heater core. After 5 minutes I got a check engine light (P1150) and shortly after the red triangle & temp warning. I noticed the coolant reservoir being full prior to that but didn't think anything bad about it because it stayed at 190F and didn't throw any failure codes. Is it likely that my issue is somewhere between engine and radiator on the heater core cycle? Maybe the core or pump itself? I just hope it's not the head gasket...

[@23_payan]

Thank you thank you thank you aiman this video was thoroughly informative thank you 🙏

[@hmongamericavang108]

How do you know the auxiliary water pump is dead did you test it? Is there a way you can test it? I test my in is spending so I’m not sure if is that. My question is if the auxiliary is dead can you test it?

[@jorgemora7190]

Very good video kid you are best we learned bcse you try to do it the best

[@pashmool3]

I have a 2007 Prius this is the third pump for the water: it is keep burning up and quit working do you have any solution for this why is the pump quitting other than that if I keep driving it what what we’ll happen?

[@cristianosorto2931]

Very helpful and useful video diagram was great as well

[@Chris-go9ti]

Say you replace nothing. Will air bubbles still form? Do you need to bleed once a year?

[@Thecamp12345]

Hey there this is hsppening on my 2013 prius v red high temp light comes on ehen drving it little different that system but very similar. Can the promblem be what you said in the video

[@craps-player]

Hi. My coolant flow control is dead. Is it caused overheating and red triangle light come out? Is there any problems with hybrid battery or 12v battery dead?

[@paulnorris792]

Great video very clear process of elimination precise thank you

[@difranophile]

Gorgeous diagram Aiman! I feel supported and capable in addressing the error codes im reading. Having a list of what was tested and costs involved in the test supplies for help limit expenses.

[@reuven2267]

I got the engine heat lamp on On a long drive Or when the air conditioner is on What is the problem ? In a computer test Write high battery temperature What to do

[@scpanther85]

2008 Prius hybrid has multiple water pumps. I learned first hand after dealership botched the replacement of the synergy drive system’s water pump, that it is very important to properly bleed the cooling and heating systems. Computer monitoring systems more sensitive than older cars. If you have intermittent Triangle, Check engine, and thermostat indicators check the reservoir. If it is empty with no leakage, odds are you have air trapped in the system.

[@Lukie2131]

That's odd because my reservoir is empty I started hearing the gurgling sound on the passenger side around or glove box and I just Don't know what to do! The car wasn't overheating it's a 2006 Toyota Prius. The guy I bought it from told me the dealer put in a new water pump not that long ago. I'm starting to get frustrated. How do I bleed the system?

[@scpanther85]

There is a whole lot more to this story concerning the dealer service department but long story short. The Prius apparently has a traditional water pump on the engine and multiple pumps for the synergy drive inverter. I basically had an air lock in the inverter coolant system that would intermittently trip the warning (triangle) light and the coolant caution indicator on the touch screen (especially when going up an incline). I attempted to fill the reservoir but it kept disappearing with no leakage. I ended up taking it to another mechanic (Toyota specialist)to run diagnostics since I knew next to nothing about hybrids. He was able to see the work done on the car by the dealer and checked out the cooling system and determined they did not do a proper bleed of the system. He filled and properly bled the radiator, performed diagnostics and reset all lights.😢 Since then I found this video. Maybe this link will help. kzbin.info/www/bejne/a3e3m2d9qtJ5mMksi=oqFShbvZOd4k0zjQ

[@kaankizil8704]

I need your help Aiman this issue is happening to me but i have another issue my heater not working its blowing cold air what can cause this what do i need to do or replace?

[@ellewaters3366]

Did you fine our

[@kaankizil8704]

Legit video my man 🤙🏻

[@kumara5492]

Hello, my Prius V 2013 with 190,000 miles having the same issue. Overheat light comes on and goes off intermittently, after changing the Thermostat . I am pretty sure sir is not in the system because I got radiator coolant got flushed at the dealer, after replacing the thermostat. Could it be bad coolant temperature sensor ? ( I read a comment from very experienced technician that coolant temp sensor can misread the temperature and send wrong signal to the system ,after undergoing overheat problem ). I really appreciate your reply. Also ,will it be very expensive repair if I ignore this overheat sign and keep driving. It's coming only after 20 minutes of highway driving. I subscribed

[@elydiaz1031]

Turn heater on HIGH. Hot air comes out? If no, it's the tStat... or not enuff coolant. Shops charge a lot, look for a local mechanic n provide the parts

[@julanmichel8149]

My Prius over heat what you think cause that?

[@cynthiah.4963]

Will this be the same for a Toyota Highlander? If not, where can I find the schematic diagram for that as well?

[@playfullysound4187]

It's quite peculiar that it sounds like you righteously solved the air in coolant circuit with too much pressure problem there causing the overflow tank to not suck back in. And yet alls you solved is finding the very slow RPM pump and replaced it with a faster spinning RPM one. I saw your other Auxiliary Pump test video with the slow spinning RPM but did you ever even solve the coolant tank high pressure and not sucking back in issue. Explanation is in a black hole can someone get it out.

[@mryusuf7354]

People sell there prius here on craigslist when overheated

[@ilickspam]

has your break actuator messed up yet?

[@ulambayardamjin7533]

Hi Aiman I have a question How to change Engine control Prius 2 gen and is it make some problems

[@renaissancemaneric8019]

The auxilary water pump looks exactly like the storage tank pump...

[@gabrielcabrera8164]

Hi Aiman, thank you for your informative videos and everything you do. In my 07 Standard prius, 20,000 miles ago i replace the inverter and inverter pump because they both went bad...now i got the code to replace the coolant control valve ... i also have 275K miles at this moment , do you also reccomed to replace thermost and radiator as well ? Thank you again.

[@nicoleancell6860]

Seems like you had to do many unneeded repairs through the process of elimination to finally diagnose your problem. What’s the best way to diagnose your pressure issue (or auxiliary pump) problem without performing all the previous repairs (ex radiator, water pump…)?

[@nicewhenearnedrudemostlyel489]

Take all the suspect(related) parts and test them independently. If they don't do what they're supposed to... it's likely that you found it. Due diligence, some won't operate at all outside their "home", some will lie if they aren't, so, make it seem as though it actually is in it's "home"

[@kevinsantiago8371]

Would this also apply to the Prius C? I have a 2012 Prius C I've been trying to diagnose, so far I've replaced the radiator cap and thermostat sensor, and it still gives me that overheating triangle when i tend to run it too hard on the highway. Moving on to the water pump and thermostat next. Any advice from anyone would be greatly appreciated!

[@ericminarovic4852]

Did you find out what was your problem? Have same issue on my 2012 Prius C

[@kevinsantiago8371]

Yes, it ended up being a faulty thermostat sensor

[@MedicsNetworking]

Bro plz tell us about Triangle sign in prius 2004 .....

[@jonathanguzman-baltazar1037]

ik

[@UncleHoCM]

Have the exact problem now with all the symptoms! Two mechanics and the dealer couldnt figure it out.

[@futbol1972]

My catalyc comverter got stolen on my 2009 prius.. I drove like that for less than 2 miles and got red triangle with exclamation point on it. When that happened car started to loose power and eventually died on me:( right now I have it at a muffler shop where they will put another catalyc converter on but car still does not turn on..when I press on power button all the lights come on like if car it's on but engine not on. Lightss, radio and power windows work . The windows are slow though so I don't know if battery it's dying

[@tomby513]

Great video! Keep up the good work!

[@EyeOnAiman]

Thank you for the moral support & thanks for watching...

[@jcrodhry5217]

Do you know where can i get those Toyota Prius 2007 Diagrams? to understand the parts on my Prius, Thank you.

[@braxtonsteinburg4160]

I had a similar issue if not the same issue. So if you only press the start button the engine won't actually start. You need to hold the start button for atleast a few seconds for it to actually start and get out of neutral. Touchy I know.

[@wellingtonbatista8078]

My car has overheating,I already replace auxiliary pump,3 way valve and it still overheating,do you think problem is that tank???

[@elydiaz1031]

Thermostat... likely. Turn heater on, HIGH, hot air? If no... tStat

[@leogoniashvili5000]

Hey Aiman, Thanks for your suggestions, they are very helpful! My car has a similar problem when getting on a highway, red triangle light comes on and it’s overheating, it even stoped running for a minute before I turned off and on. When I Brought it to my mechanic , he scanned and read code P0A93 which is for inverter water pump. We replaced inverter pump , but it did not solve the problem. I’m thinking to follow your suggestion and replace auxiliary heater pump, but I’m not able to find it online aftermarket ones and ones from the dealer are around 800$. Do you have any suggestions where can I look for auxiliary water heater pump . Thanks

[@Jacky051994]

We’re you able to fix it ?

[@jbek9779]

Any updates on yours?

[@MrRomuks]

Somebody?

[@cissne22]

Junk yard

[@donw3861]

Plenty of Prius tow cars sitting in police impound yards waiting to be auctioned off for not much money.😜🤑

[@saborguerito]

I think I'm having a similar problem. The sound my car would make after turning it off, I think is when it puts water into that storage tank, it doesn't sound normal anymore almost like it is struggling. Well, when I am on the freeway at 65mph or so, I get a red triangle "problem detected" and after it does it a few times I get the same thing and the icon on the screen indicating overheating somewhere. I wasn't sure if this was the engine or for the battery pack but it was charging the battery and discharging. Driving on the streets the car works fine, or at least it doesn't report an issue. What would be your guess?

[@TheEToE]

Lol what did you end up doing

[@patti1459]

I'm a lady mobile mechanic and people I know only call me when they have messed up. The 65 yr old friend has teated this vehicle(his cousins car) after he said he'll put on an A/C line. Ok here we go: 1st: he jacked it up from the front, so I put a jack stand under veh. removed A/C compressor before disconnecting neg. cable, than stripped the threads on compressor where line goes in. I can maybe fix that. My concern is that he put trans fluid in the coolant reservoir. I removed Reservoir and need to flush system. I know use Distilled Water, If that so will it hurt electric water pump? How long should I let it run

[@urfranz]

hey man that's cool, because it was cold the other day so i turned on my heater in my prius, it was blowing ICE COLD AIR and it was on HI, so now i got the CHECK HYBRID SYSTEM and the temperature gauge, any advice my friend?

[@TheEToE]

Lol what did you end up doing

[@benmiller200]

For whatever reason they connected this water pump to the am2 fuse and it's absolutely a nightmare to diagnose when it fails by shorting this critical line of electricity leaving your car dead in the middle of a freeway

[@DavesQualityAutoService]

Kool video. So what was the repair. Did you ever get it resolved?

[@kaankizil8704]

He mentioned aux water pump

[@mohamed1104]

What a small world. My name is Aiman also!

[@genxchas]

Inverter cooler pump

[@johnvasquez7112]

The code p148f00 came up at he dealer But on my dashboard it said pre-collision sensor malfunction for my 2016 Toyota Prius They said the reason was because of running in the car with not enough coolant

[@jcrodhry5217]

Do you know how to remove the Red Triangle from the dashboard, at this moment all the lights are on and the car doesn't drive, until I disconnect the battery and reconnecting back on? there is not any weird noise or leak, and the hybrid battery still working properly. any advice?

[@montanafields709]

Did you ever figure out your problem? My fiance's is on as well as a few other ones but we took it to Firestone and both batteries where fine and it reset on its on. Just wondering if you figured anything out. Thanks

[@luisrichardgomez]

I had same problem I discounted the battery back and it removed red trainable of death.

[@eddiechimex]

@@luisrichardgomez do you still have the red triangle on?

[@luisrichardgomez]

@@eddiechimex What year your Prius? My 2008 Prius I changed the Inverter Cooling Pump see videos easy to do. But be careful because coolant drops make sure refill coolant buy it at Toyota Dealership. My Triangle of death went away after fix this. I also would discount the battery in back then hook up after you did work see if it turns on. My turned on and removed the triangle of death from doing that. Good luck. 🍀

[@eddiechimex]

@@luisrichardgomez I have a 2007 prius with 125 000 miles. I replace the water heat control, both oxygen sensors. The red triangle is not on right now, but after I drive for a while the light comes back on again, I stop driving the car fue a while, then when I drive the car again the light disappears. I don’t think the car is overheating cause the coolant level it’s fine. Should I keep driving the car even when red triangle is on, what you think? Thank you for replying.🙏

[@laykimleang6295]

6:18 P1116 And P1118

[@dair805]

Solution???

[@Flowcap]

Thank you brother

[@EyeOnAiman]

Thanks for watching...

[@jennifermorales7787]

Good job buddy. My red triangle and temperature light is intermittent. It goes on for 3 seconds then disappears. 🤷🤷

[@jennifermorales7787]

Btw, had replaced the coolant control valve a few months back so it's not that. Just got 200,000.

[@pinchejavi4708]

@@jennifermorales7787 Did you ever find out the problem? My car is doing the same thing.

[@oneamericanlife3441]

Hlo i had same problem then i went to valvoline repair they did in 2 minute for free

[@elydiaz1031]

Unsure if you figured it out. But I'm going thru the same now... it's the thermostat. If you turn heater ON, High, and cool air comes out, Thermostat is stuck Closed. It's not hard to change, but it involves draining coolant, rinsing radiator if u want, new coolant, and bleeding the line for air bubbles. Suerte

[@DanielHernandez-gu7yo]

 Cómo se pronuncia Hello friend, I have watched your videos and they are very helpful. but I have a big problem I am from Mexico and my prius started vsc + check engine plus the red triangle. I've tried the cells and everything is perfect. I dont know. If the water pump is the cause. but I don't know that symptoms give a bad water pump. please help. :(

[@EyeOnAiman]

Bad water pump would usually have a temperature icon warning because engine is overheated. It is difficult to diagnose the all these warning signs, we came across this situation one time and it was a dead 12V battery. A friend had similar issue and had to replace one of the pumps, not sure which one, we'll find out...

[@DanielHernandez-gu7yo]

@@EyeOnAiman thanks for answering. Change the 12v battery for a new one. install everything again and everything perfect. I went to a gas station and back home turned on the lights. I am in that it can be inverter pump or cool fan rear battery. :(. The promble is. don't dial me code

[@EyeOnAiman]

@@DanielHernandez-gu7yo The drawback of Prius Gen II is that you cannot use OBDII to read the fault or error code. You can buy Mini-VCI / Techstream cheap on Amazon but you will need an old PC or Laptop running Windows 7. You should be able to get the right code. Even if you go to the mechanic shop or garage, if they don't have the right scan tools, they cannot read Prius Gen II codes properly.

[@DanielHernandez-gu7yo]

@@EyeOnAiman thanks friend. I will try to find where to scan my prius correctly, but it is difficult in my city. They do not work with hybrids.

[@serrossssorres1461]

@@EyeOnAiman 2008 Prius no power to the inverter converter electric coolant pump,I need the location of the source of the power fuse or relay perhaps a diagram.Can you help-__?

[@varisilaceinaturaga9726]

Red triangle appeared and car cant move

[@sonhtung75]

Was hybrid battery dead?

[@JM-nh8yp]

good video. But WHY, WHY, WHY?! would you replace parts that aren't bad??? A new radiator? coolant control valve? etc, etc. Thats an expensive and time consuming way to fix the problem

[@EyeOnAiman]

Not sure how to answer the question, but perhaps I can try answering the questions with questions and answers. Why should we replace the brake pads before they the metal rubbing? So that we don't have to replace the rotor. Why do we replace the tires before they became legally bald? To prevent flat tires & possibly avoid accidents & injuries. The new radiator was free. The old one can be used as a back up in the case the aftermarket failed. The control valve? The car is 375,000 miles, eventually that pump will also gives in, why not do it at the same time as the other pumps?

[@JM-nh8yp]

@@EyeOnAimanI understand the brake pad and tire analogies.. I hope that you realize that these are normal wear items from FRICTION, which is totally different. Of course you need to replace the normal maintenance items on a vehicle. That's in the owners manual. But the radiator and coolant components are totally different. I have no problem with the fact that those were replaced. Its your decision. But if I took my car to a mechanic and they just started replacing parts for no reason, I would be upset. Its not the professional way to do automotive work. In some cases, it does happen though.

[@MrBobbyw121]

Yeah it sucks but sometimes a DIY mechanic has very limited testing equipment so they must "TRY" to make an educated decision and throw the most likely part at it. While an actual mechanic can take a part off and bench test it.. it all comes down to availability, price, And ability to check items.. but you already know this; you are just playing CAPT hindsight.

[@santagurrero2591]

En español por favor

[@javierargote]

ouedes siempre auxiliarte con el traducto de google .

[@MrKittystud]

Let's replace every part until we find the problem......1million dollars later and 20 parts replaced we found the problem. Should of bought a new one😑

[@dougiee6589]

your mechanic does alot of guess owrk repairs and you ripped off big time brah!a proper pressure test check on the coolant system through the radiator will reveal if it is blocked aye mon

[@terri4478]

In America give Us English speaking people to teach us things I can't understand the word he's saying

[@brianperkins6121]

A couple of things The prius is tricky even with use a Vacuum filler due to the fact that unique 3 position coolent valve position will isolate parts of the system from your bleed efforts depending upon what position its in ,,allways make sure the coolent recovery reserivor is kept full to the proper level otherwise the car everytime it cools will draw all the coolent out of the reserivor and then draw "air" into back into the system when it cools. this air will then get trapped in the system with no where to go Go through the system and check that all the hoses are connected to there "proper ports" I have on occasion had people put them back reversed on the coolent control valve. its hard to do but check , The Coolent control valve has been an issue historicly as it can stick in the wrong position an internaly leaking control valve will also cause Havic with by forcing coolent into its electrical connector and shorting its signals out as well as ruining the wiring harness and eventualy and ECU if it manages to force coolent back internaly allong the wiring harness into the ecu connector. pull the wiring connector on the Coolent control valve and check make sure its not doing this. Some info on these issues as well as a bleed procedure. automotivetechinfo.com/wp-content/uploads/2020/09/Mastering-the-Toyota-Gen-2-Prius-Engine-Cooling-System.pdf

[@fgj8353]

Hey guys can somebody help me with this code P0A37