Prius (2001-03) :: Red Triangle Comes On And ICE Drops Down To Idle While Driving
Aug 24, 2011
On my 2001 Prius, while driving down the road the red triangle comes on and the ICE drops down to idle and the car slows down to 29mph. If I floor the gas peddle the car may or may not pick up speed slowly but if I let off of the gas peddle the least little bit it will slow down to 29mph. If I stop and turn the car off and then back on the triangle is still there but the car runs fine. After turning the car on and off 2 or 3 times the triangle disappears.
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My 2005 Hyundai Elantra GLS has had 0 problems. It has about 132K on it, but it's still awesome.
I was stuck in some nasty traffic the other day in 95 degree NC weather, and was idling for about 15 minutes with the AC on. Out of nowhere, it felt like my AC got warm and I saw my coolant temp gauge spike from just under midway to 3/4 of the way. Unsettling.
As soon as I got on the gas and drove for about 5-10 seconds, it dropped precipitously back to normal. I was able to recreate this behavior once I got home. Normal driving results in normal temperature. Both fans appear to running.
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A few days ago the PS light along with the Triangle came on while my partner was driving. We've been noticing a slight shimmy with the steering wheel while backing up only, until this issue came up. Otherwise we've seen no other issues with the steering while driving.
When we took the car, which has 167,000 miles on it, to Toyota, we walked away with a $3,770.00 estimate to replace the power steering system.
Some of you noted earlier that you continued to drive your cars when you noticed the PS having issues. One guy said he did it for 30K after the first warning. I'm wondering, how did you get the PS symbol to go away? (The dealer reset ours, I'm wondering about if it comes back.) Are you still driving with the issue?
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I have a 2001 Prius with 210,000 miles. The inverter and traction battery were replaced last year. I started getting triangle and check engine lights about a month ago and the scan tool read p3191 p3006 p0300. The car would barely start in the mornings and the dash lights would be dim. I replaced the 12v aux battery today and all the symptoms went away. Driving home the triangle/check engine light popped on again and I stopped at Orielly's to use their scan tool. It now only reads P3006. I called a local mechanic who suggested to drive it a bit and clear the codes because the battery needed to equalize. Is this true?
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So I have come into ownership of a 2003 Prius and now I'm having issues with the power steering. I contacted Toyota and they told me the recal for the pinions was completed in 2012. Now own in the car I've noticed the steering wheel will start to violently shake and just last week while driving I got the warning triangle and the PS symbol and I lost all power steering. All this happened while driving on a highway. Toyota wanted to charge me 150 to diagnose the problem which I declined and took it to my well trusted mechanic. He told me the rac needs to replace. I've done a lot of research on this problem and have found many people complaining that even after having the recall done, they still had a problem and also were told the rac needs to be replaced.
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have a 98 rodeo, with a V6 & Auto trans. have an intermittent problem - as I am driving engine will occasionally drop to idle speed and then pick back up to driving speed. Engine keeps running smoothly, just at idle speed.
CEL does not come on / no codes
Replaced Throttle Position Sensor - and thought I had found the problem, but since it is so random, it just didn't happen again for 1 1/2 weeks.
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I have a 2001 elantra gls automatic. I have am suffering what seems to be a common problem with these. while driving my car randomly drops into third gear, also sometimes it sticks in like second first (like 5000 rpm just to go 30). my brother put a computer on it and error codes popped up: p0500 vehicle speed sensor; p0501 speed sensor range performance; and p0720 output speed sensor. I checked all the wiring and none of it is damaged, so I'm thinking bad sensor. What i really need to know is, could one of these sensors be tripping the others and if so which one? or should i replace all 3?
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Its not my car (its my father in laws). The other day his 05 prius (170k miles) shut off while he was driving. He pushed it home and I sent him a link on how to check the 12v battery. He said it showed it was low so he used his golf cart battery to go and take it for a test drive to see if that fixed the problem. In the drive way at idle his hybrid battery charge went up half way but when he went to drive it he got 1/8th of a mile down the road and it dropped to 0 then the car shut off again. He said the display says something about the battery (I haven't been over to look at the car).
They are sure its the hybrid battery, but if it was me I'd go to the dealer and find out for sure. My husbands aunt had her hybrid battery go out and hers did other things, like go into turtle mode and a/c blew hot. I think her inverter pump went out and she kept driving it till the battery got messed up, but anyway...What does my father in laws symptoms sound like? Is there any extra at home testing that can be done?
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I own a stock 2008 Prius.
My car didn't move for 1-2 months so I needed a boost this morning. I noticed there's the check engine light on and a red triangle.
Also, the car won't go on electric mode.
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I was driving on the freeway in houston yesterday and it was about 30 degrees. The low temperature light was on... Does it make a difference when it is cold? Why would there be a light to tell u that it is cold outside?
Anyways as I was driving on the freeway the red triangle with an exclamation mark came on and disappeared. Then a minute later it went on again and on the navi screen shows high coolant temperature symbol on it. But then it would turn off right away too so is this normal because I was kind of slowing down on the freeway and the book did say something but I don't think it was an excessive speed or anything.
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I just changed my inverter coolant pump which is running perfectly well. However in recent times, whenever I'm on the highway with ac on or there is a sudden brake, the red triangle light pops up. Checks on the inverter pump show that as far that is concerned everything is working. I'm really getting worried over this.
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I have 2005 Prius with 110k. Yesterday, red triangle and check engine light came on and I lost power while driving...SCARY. Took it by dealership. They called this am and said it needed a new HV-ECU and that would cost $800. The error codes they gave me were P0A78 and P0A94. Anything else I should ask them to look at? I'm wondering if the HV ECU is something I could buy used and install myself? I'm not a mechanic but am comfortable with most DIY projects.
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2007 Prius 215,000 miles. Car has been a champ for the almost 2 years I've owned it, buying it with 150K miles. No real troubles and I've been driving it constantly as you can tell. Had an extended warranty repair done back in the winter when dash lights went out completely yet car would still start & run. Replaced 12V battery back them trying to diagnose trouble and it was original battery anyway. Daughter was driving when almost all dash lights came on including the red triangle. She came back home, turned it off. Next start was just red triangle and check engine light with red car on center display. Now it's just the check engine light and red car after sitting for an hour. I plan to take it in to get check engine light checked out.
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I've bought a second handed European Prius 2en Gen from year 2006, the car is wonderful and I simply love it ! I wouldn't change it for anything, but yet I have some problems with it.
When I start the car I get the Red Triangle on the front panel, and exclamation symbol, a VSC symbol and an engine (?) symbol on. On the Display I always have a black bar on the top with a car and an exclamation point on it. Both can be seen int the pictures below....
At this point the car runs normally, the only things I notice are :
1 - When I stop the car (without shutting him down) I notice that the consumption of fuel is at 99.9/L because it is charging the battery, which is already full.
2 - The back-right ventilation fan of the car (on the passenger seat) is ON even when the Air Conditioner is OFF.
After a few miles (I don't know exactly when it happens, sometimes it happens when stopped, sometimes when on the road), the car beeps and then it shows a, on the same black bar on the display, a message saying "Problem", after a few seconds I get a Battery symbol on the right of the car with an exclamation point symbol.
At this point the car starts having the following problems :
1 - The motor begins to speed like if I was at full speed on the highway.
2 - I simply can't do an uphill, the car won't pass the 20Km/h speed, if I gain balance before arriving at the uphill, it will start losing speed until reaching the 18-20Km/h.
At this point I really don't know how to solve this. I only know that, the Toyota Representative here where I live (in Portugal), ask me for 2,975Euros (almost 3,263USD) saying that it is a problem in the Hybrid System. But yet it seems strange because from what I know, if the Hybrid System was compromised, the car wouldn't start at all.
Does changing the 12V Battery on the back would solve this (even knowing that the Display shows a fully charged battery ?) ?
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The red triangle first came on when my parents were driving my 2001 a few months ago. They described lack of power, etc. As the car was several hundred of km/miles away, I didn't have a chance to see it for myself until it got towed back (as they no longer trusted it to navigate through the mountain passes with several medium to long steep hills between the two cities) a few weeks ago. When I took a quick look myself (not a mechanic myself, just basic observation), the battery would drop "1 bar" with only very moderate use and quickly gain 1 bar or 2 when charged by the engine. Basically, the battery level is dancing between full, 3/4 full, 1/2 full, and 1/4 full continuously.
Mileage: 226000 KM / 140430 MI.....
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So my daughter has a 2006 120,000 miles Gen II Prius, she called to tell me she started driving today and although it still shows 2 bars left worth of gas while driving she said it seemed to lack power which leads me to believe that it might be fuel related, she drove a few more blocks and as soon as the battery was all used up the check engine light, traction control light the large red triangle came on then soon after the car shut down and now is unresponsive.
What is possibly wrong with it, the car is about 2 hours away so I have no way of checking the codes or is there a way to check the CEL codes from inside the car.
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I was at an intersection and red triangle came on dash and lost all driving functions. Had to turn power off, then turn back on. Was able to drive 100 yards to a parking spot, but it went out again. Reset car again, then it happened 4 more times within 2 miles while driving. Had to call tow truck. Just kept shutting itself down. How to fix this. See picture below for the message I got when it happened. This is the first time my car has malfunctioned like this. I think maybe its throwing itself into park or neutral (judging by the P-lock message below) and cuts all throttle control to car. Has 105,000 miles on it.
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I got a rebuilt 2008 prius 2 days ago , today while I am driving , the big red Triangle appears , and on the MDF screen i think its a red temp mark , before the red Triangle appears , the ICE become like crazy loud sound from it, so i bring my mini VCI and i got the following info (i will post it as an image ) .
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Strange thing on my 2006. Driving on curvy road, would occasionally get just the "Red Triangle" exclamation point (for a second or so) -- and also the word "Problem." would flash up on the display.
No permanent check engine light or other icons lighting up. Still getting 40MPH, everything seems to be driving right. Have 135K on the odometer.
Question - does that triangle thing store codes that can be read by an OBDII reader each time it flashes -- or does the check engine light need to be on?
Second Question - Any clue what the word "Problem." with no description could refer to? It goes away at the same time the red triangle goes away.
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I was on the highway yesterday when the red triangle went off and the screen said Problem. I babied my 2008 Prius to the dealer. They said the 12v battery was bad. I should have just gotten the yellow top in last week like I wanted but oh well. Here is the problem, today it did it again. It first happened at 70 mph but today it did it first at 15 mph then pretty much stayed on until I did not accelerate for a while. No noticeable performance issues, just the warning indicator. I did notice the noises after shutdown are sounding different than before last week. I also put a code reader on it both without running and on a test drive and no codes showed. What is going on?
More info: Just hit 100,250 miles. Purchased on March 17, 2008. Went in last week before the 100,000 miles for a check up and ended up with $1,000 for a coolant pump (both now, other coolant pump was replaced within the last 6 months). Also got: break fluid, belt, break alignment, oil change, tires (this I was expecting hardly passed state inspection in March), possibly something else.
I have been doing the oil changes since 15,000 miles, filters, pcv (or pvc whichever), all normal items. Problem free until I have them do a check now issues. So to recap non normal items done: blower motor in 2009, radio replacement in 2008, coolant pump in Mayish, other coolant pump and 12 v battery last week. Read more : [URL] ....
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My 2001 won't start. When the key is turned, the system starts up and the hybrid system initializes, there are 3 clicks in the dash, and the check engine light stays on, without the engine even turning over. I had a mechanic look at it cursorily and he said it looks like the hybrid system is fine, the signal to start the engine isn't resulting in the engine starting. He said it was probably the starter or a fuse to the starter, but the gen 1 Prius doesn't have a starter, so I don't know that I can trust his diagnosis.
The 12v battery is brand new (3 months old) and is an aftermarket deep cycle battery. Also, it has been very cold here. The triangle of death doesn't appear, so I am hoping that it isn't something in the hybrid system. It did this off and on before it stopped starting at all. I was also getting the turtle intermittently when it was giving me occasional problems. Turning the car off and on a couple times usually made this go away. The car has 154k on it. I am thinking it might be the ignition starter switch, but I'm not sure.
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