Prius (2004-09) :: Red Triangle / CEL On And Lost Power While Driving
Jan 23, 2014
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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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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My 05 prius (105k) has been running great. Today I was driving up a mountain, approx 70 mph with ac full blast, when all of a sudden I lost all power. The triangle of death came on.
I immediately stopped the car, tried resetting it and no change. I got it towed. Before the tow, the headlights were on and I asked the guy to turn them off twice as I knew the engine might still be on.
Anyways, it got towed approx 4 miles to my house, and the vehicle was on.
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I have a 2008 that has always been dependable. 1 mo or so ago when driving, lost all power. Had it towed to Toyota and they replaced main fuse. 2 weeks later, would not start. Replaced 12 v battery. 2 weeks later, won't start again. Towed to Toyota again. (300 for the two tows, 225 for battery, 350 for fuse) and Toyota said working fine. No failure and they didn't find anything. No error codes. I need car for work and can't keep getting stranded and needing tows.
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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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While I was driving my car suddenly was losing power.I tried to hit the "gas" pedal harder and it didn't react.It stayed on the same gear and after 2-3 seconds it was ok. After 10 minutes it happened again but this time I couldn't do anything. I thought it was the transmission problem so I went into manual mode to shift it down. It didn't work at all - I was shifting down but didn't have power so I had to stop. I stopped put in P turn engine on and everything came back to normal.It's worth mentioning that one time time I had to pull over and I didn't turn the car off. After couple minutes the car started to vibrate and died. I turned on and everything was ok. Fuel filter or is it something else?
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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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Up until this morning I thought I had almost a perfect car with a potential of lasting for 10 years but this morning, while I was driving on a local road with 35-40mph, so suddenly my car stopped moving and I couldn't even pull over as it completely stopped with no error or any warning/alerts! So, I turned it off and on again, it started working but I was still nervous if it would happen to me again while driving on a freeway but it didn't and I have made to work safely.
Now a question is should I bring it to the dealer today and have them run their diagnostics on their computer to see if anything is wrong with the car engine/ battery/ or anything else or should I just reboot it like we do for computers and go on everytime it happens? It's just little scary to think of its happening during a busy highway driving! I have driven it since July and has about 14K and I have had a good MPG of anywhere between 50 to 60.
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Lost all acceleration yesterday while driving at highway speed. Tire pressure light came on also large warning sigh and check engine . Had been stuck in bumper to bumper traffic before this with AC on.Gas pedal to the floor but no acceleration. I pulled over and shut off car. When I tried to restart the lights mentioned above went out Except the check engine, NOW all the brake warning lights are on in a yellow color including the emergency brake.Brakes do stop the car (had to push it onto the tow truck) Car comes on but does not display the READY sign.
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So I was driving home last night and went to accelerate and it felt like something slipped, lost acceleration and the red triangle of doom popped up. car worked fine for about 15 seconds then just the electric battery was being used.
Drove about 100 feet then got no response out of the throttle for anything. Had to push it the rest of the way home.
Towed it to dealership, been there for 3 hours and they still haven't found the point of failure. Once they give me diagnostic codes I will post them.
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I was on my way to work this morning when the car just stopped accelerating (or so it felt), all the dash lights came on, I pulled over to the side of the freeway (I was very lucky). Radio and a/c were still working. Powered off, powered on too soon a couple of times - the red triangle and check engine both came on again. Cooled my jets and gave it a few minutes, powered on and the red triangle was gone, but the check engine was still on. Drives perfectly, no problems w/either gas or hybrid engine.
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While driving a mountain road (hwy 17) going downhill this morning I lost power braking and power steering and a got the following error message on the display
TRANSMISSION P LOCK MECHANISM
PARK CAR ON FLAT SURFACE AND APPLY BRAKES
I was able to stop the car on a flat area. I turned the ignition off and then restarted the car and the power steering and brakes came back, but the red triangle remained. I drove to the Toyota dealership and left the car for service.
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Driving in city. First sign was battery light illuminated in dash. Then it went off, then back on. Radio shut off. Then all warning lights illuminated in dash. I'm still driving about 40mph to my destination. GPS goes dark. Tech needle goes to zero, then speedometer goes to zero. I'm still driving approximately 30 mph. Lost headlights. It's dusk. Lost all lights in dash. Slowly moving now and looking for a place to park. Now losing engine power. Coasting to curb. Lose all power and mobility. Call tow. Thought I could smell a slight electrical burn from under hood.
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2008 Prius with 284,000 miles-never had problem. Now, started car, no power steering (red triangle). Ordered new power steering control from ebay, went out of town for 10 days. Return, car is DEAD! Trickle charge via fuse block, get car started finally, still no P/S, but it shows charge then shuts engine off. Start and it does same thing.
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Purchased a used 2006 prius with ~180K miles on it from south bay a few months ago. At the time of purchase the guy warned us that it 'ate' motor oil.
After 2 months of driving without issues (driven couple of hundred miles), on an uphill road the engine overheats and throws the red triangle, vsc and check engine lights on the dash, along with loss of power. After cool down I check oil level and sure enough it is low, since this is on top of a hill we essentially coast all the way back home without any real issues. Once home I top up the oil. I do a test drive around the block without issues (no loss of power) though the check engine/red triangle/vsc lights are still on. But after I take it for a longer drive the loss of power returns.
Since my bluetooth obd2 connector wasn't working I borrow one from my friend and try to get a read. Unfortunately the thing puts out no obd2 error codes. Living in the bay area I apparently cant just take it to an autozone, to get code readings. I take it to meineke auto repair, they too are unable to get an obd2 read, and want to charge me $100 for a full reading, which I decline.
I do a few diagnostics steps including 'resetting' the computer by leaving it off of the 12v battery for a few mins, this clears the red triangle et al on restart. I do a test drive, at first everything is working just fine, but after about 10 mins or so of driving the red triangle/check engine/vsc lights returns, along with loss of power. (under ~20 mph only, cant go uphill).
Take it to a mechanic and they come back with code: "APOA92. Trans Axel issue - MG1 performance is off. Measured torque is different than executed torque, enough to be a problem. 95% sure it is the transmission." I still haven't checked the 12v battery.
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I changed my oil, oil filter, air filter at 90k for a trip to Miami this past weekend. Uneventful on the way up. On the way back, stopped and did some shopping before hitting alligator alley to come back home. As I got on the alley after paying the new $3 toll my 05 prius with 90k miles on it would not go over 65 with my foot on the floor and the battery on the mfd was in the pink. So I drove to the nearest exit, checked the fluids etc, all good. Got back on same thing so I put on hazards and stayed on until i could get off on a much slower road. I was going about 55-60 and it would go no faster.
As I got to a place I pulled over DC'ed the negative battery cable and let it sit for a half hour. I then attempted to get going and it seemed to be running fine until I attempted to pass a car and the car seemed to lock up and lose all power, check engine light came on and the red triangle light came on. I pulled over and let it sit again. I then got it to a gas station with the check engine light on. I put a few gallons gas on and tried to limp it home. It made it home and the battery seemed to recharge back to all the blue it can get to, but has yet to hit the green.
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I have a 2008 Prius, with SKS and Nav, and 103,000 miles on the odometer. I bought it from the original owner in 2010. So far it has been trouble free, with just oil changes and scheduled maintenance.
When I turn power on, I get a red triangle with exclamation point. Also a row of yellow indicator lights. Also along the top of the LCD display there is a red car shape with an exclamation point on it.
I followed the procedure for checking the voltage of the 12v battery using the diagnostic screens, using the procedure at weird-stuff-happening-mpgs-dropping-test-the-battery.73400/and I got 11.8 volts.
Since it seemed likely that my problem is related to the (original OEM) 12v battery, which is now 6 years old, I took my handy jump-start battery thing (see photo below) and attached its red alligator clip to the positive post under the hood, and the black clip to the frame. I hoped that would allow me to start the car, but it did not start. The error lights on the dash were unchanged.
Question 1. Does the fact that the symptoms remain the same after I have connected my jump-start battery mean that the problem I'm having is NOT my 12v battery?
I then hooked up my cheap OBDII code scanner (see photo below) and checked for codes. It found none.
Question 2. Does the OBDII scanner not finding any codes have any importance? When people write about having their car towed to the dealer and having error codes read there, does that refer to OBDII codes, or are they referring to some other type of codes that can only be read by a dealer?
While I was in the diagnostic screens, I found three screens of error codes. The screens are called DSP-AMP, EMV, and NAVI. See 3 photos below.
Question 3. Do these error codes have significance?
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So am i the only 200,000 miles prius owner on here? I have an 05 toyota prius, purchased with 44 miles on it. I now have 218k miles. All I've replaced was an o2 sensor and a few other minor things. But it died last thursday, had it towed to my house, still don't know the extent of the issues. I had the following codes P1116, P1121, P3193. I was driving on the interstate and all the warning lights came on and i lost power as i got over. Jumps would only allow me to turn my lights on and dashboard, but the engine doesn't start.
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