Prius (2004-09) :: No Fault Code But Intermittent Red Triangle
Jul 25, 2016
Seems like issues with my 06 prius battery are back, however this time it is rather strange but very predictable. I cannot read any trouble code as the red triangle on the dash (and "problem" on the display) never stays on more than a few seconds (1-5 seconds at most).
At first it was doing this only after long downhill driving (like my 1.5 mile downhill street at 25 mph) - charging the battery and once getting to the last green bar I would get a Bip, red triangle and "problem" on the display. This has been going on for 4 weeks roughly.
But it's gradually getting worse, the same symptoms would appear after shorter downhill driving. And now it does almost every time I get the foot of the accelerator (assuming the car has decent momentum to regenerate).
I am guessing a module is starting to fail but last time I had a failed block, it didn't do that. One day I got the red triangle along with a bunch of other lights and that was it.
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My daughter recently bought a 2006 Prius with 170K, Car was running great at purchase time with no issues but unfortunately the honeymoon was short lived. Less than 50 miles, she got the check engine light and red triangle. Car seems to still to drive fine. Had a dealer near Knoxville TN pull the codes and the only code was a P0A9C - Hybrid Battery Temperature (Sensor A) Range / Performance. Was informed also as they checked history on the car that another dealer had recommended a new hybrid battery and inverter. Dropped by the other dealer today to get the codes that they had seen. The codes they had pulled at 169K on the vehicle were:
P0A80 - HV Battery Cell Delta State of Charge Fault.
P3016 - either a bad cell, or a shorted cell in the hybrid battery
P0A08 - dc/dc converter status circuit.
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Our '06 has 68K on it. Last weekend I changed the front bumper (just cracked from small accident last year) and changed the oil. Used Mobil 1 5/30 and a Fram Oil Filter.
After about 125 miles of driving intermittent Red T.O.D. Always when ICE is running.
Oil level is OK - not loosing any oil. Filter and bolt on the pan are fine - no leaks.
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PPH: (Possibly Pertinent History)
Original Hybrid battery failed April 2015.
1st rebuilt (Dorman) battery installed April 15 - Failed July 2015.
2nd rebuilt (Dorman) battery installed July 2015 - Failed October 2015.
3rd OEM (Toyota) battery installed October 2015.
Front end alignment (stay with me) May 2016.
Intermittent Red Triangle of Doom June 2016-present.
Installed Camber kit (yesterday...)
After I realized that I could duplicate the conditions for the triangle appearing/disappearing (brake/veer left to make it come on, accelerate/veer right to make it go away), I relaxed on the urgency of getting this addressed. After all - if the triangle goes away, there really isn't much of an enduring problem (I thought).
Brought the Prius to Legacy Toyota (Tallahassee, FL - BTW, I have only good things to say about this Toyota dealership) and the mechanic and I replicated the conditions while the Toyota diagnostic computer was attached.
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I have a 2007 Prius 5 with 205,000 miles. Just recently, while Im driving the Red Triangle blinks on intermittently along with an annoying beeping. I took to dealer and they diagnosed error code C1300 which indicated that I needed a new "Brake actuator assembly with skid control ECU". I declined price tag because they said it's nothing critical (despite that it sounds rather important), and car will run fine without replacing this part. However, they said "nothing we can do about the intermittent red triangle and beeping".
Is this true? It's a very annoying noise. I know that it is possible to turn off the reverse beeping. Isn't there a fuse associated with "beeping" that could simply be disconnected?
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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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So let's start with this. A week ago my dad went to start his car after going to the store. I wasn't there so can't say exactly what happened but when I got there the car would basically go into accessory mode with check engine light VSC and triangle on. Also displayed problem on the screen. I checked 12v battery with just the radio on (one button press with foot off brake) and it only showed 12.0 volts. So I hooked our jump box directly to the battery and it still wouldn't start. I scanned it for error codes and it showed nothing but I could erase them and the lights went off so probably codes from one of the hybrid computers I can't read but the car still wouldn't ready. I unhooked the 12v for about 30 second seconds and the car started fine without the jump box hooked up.
At this point I don't have any codes and with nothing to go off of I'm at a loss. We drive it 8 miles back to our shop and it drove normally with no errors. Once it was back in the shop after turning the car on and off 10 times or so still no errors. On the last time it was in ready mode and the errors came back on, still with no codes I could read. His 12v optima was still under warranty so we got it exchanged for free even though I was reluctant that it would fix the issue. Well a week went by and all seemed to be fine until yesterday.
My dad had left the car in ready mode for probably 20 minutes and when he got back in it all the lights were on. I will also add that the battery fan was operating normally and not screaming like if there was a traction battery issue. I changed one of the modules in his traction battery about 6 months ago when one failed. Without any codes I don't know where to start with this problem. 2005 with 170k miles....
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I have a 2006 with 106K miles. Noticed after making a sharp left turn in a parking lot that the Red Triangle came on along with a beep and the message, "Problem" on the touch screen. Started happening more frequently either when the wheel is turning left or if I'm driving straight and the car drifts a little towards the left if I'm on the highway. Today it happened about 6 times. Warning goes off after a couple of seconds.
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Just got a diagnostic from the nice people at Prius Battery Repair. Check engine light was on and intermittent red triangle when I make a left turn. Code PO505 came up- Idle control System. I have 162,000 miles and just put in a reconditioned battery that checks out fine.
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have a 07 prius with 113k miles. It recently displayed the red triangle with code p0aa6 sub code 612.
I took apart the battery and nothing looked corroded, then on the inside of the bus bar i found a small amount of corrosion. After testing the cells i found 2 modules that were leaking voltage.
Since I had everything open I figured I might as well test to see if any cells were on there way out. The static voltages were pretty close around 7.8v, there were a couple modules that were .3v apart that I'm doing more testing on. I load tested each module with 1a, is 1 amp enough for a load test? I have a 100a load tester but figured that was way too much. They were all ok under load test, dropping about .6v and returning to original voltage within a few minutes.
Then I decided to check capacity on the bad cells, they were about 500mah, got to 1000mah after 1 discharge/charge cycle. I tested the capacity on a cell I thought was good and so far it discharged about 1050mah until it reached 6v, this was from 7.77v. I'm giving it some time to rest to see if it goes back up a bit and then I'll discharge some more till it stays at 6v. Even if I get a little bit more in it will be way under the 6500mah it should have or even the 3500mah that I've read is acceptable.
Since all of the modules have parameters that are pretty close I'm thinking the capacity will be pretty close as well.
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I picked up a 2004 Prius with 150k. It has no check engine light and no codes with a scangauge. I hooked it up to a mini-vci with techstream and found the following: P3009-526, C1310 and B1421. The car will only start if you reset codes, then after a few minutes of running the red triangle comes back.
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Was driving home from school yesterday and my 2005 Prius turned the check engine light on and the red triangle light. Plugged into the scan tool it read: P0a80. I have a hybrid battery ordered. It should be delivered on Tuesday. How long can I get out of this failing battery before the car is undriveable? The Prius is my only vehicle and I don't have a problem with installing the battery, I just I'm wondering if the car will just drop dead on me before the battery gets here? The car appears to be driving normally with no loss of performance or MPG.
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Had a company install fog lights on my replacement 2007 Prius I picked up after I totaled my 2008. When i went to pick the car up, the car wouldn't start. Showed the triangle of death and threw a code that the 12v was bad. Probably from having the car off and testing the fog lights continually - resulted in a drained battery. I picked up a brand new yellow top optima battery and thought this would resolve my issues. Nope, once the batter was replaced, the car wouldn't go into Drive or Reverse, only park or neutral. The current code is P0A0D. The shop is baffled. They removed all modified parts and still can't figure out the issue. They are currently replacing the interlock plug in hopes that this will resolve the issue.
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2004 Prius, 149,000 miles. Driving on a highway when suddenly it felt like a headwind was bearing down on me, and a minute later, the red triangle of death and all the other lights came on. Did not totally lose power. Pulled to the shoulder and while waiting for the tow truck, started and turned the car off several times.
After the first few times, the red triangle did not light up, but the check engine icon remained on. The tow truck driver had a very difficult time getting the car into neutral to pull onto the flatbed, and then when he took the car off the truck to park it at the dealership, he said it shifted "hard" into drive.
I don't have a code since I don't own a reader. What this might be? I really, really hope it's not the traction battery needing replacement. I have no training to replace single cells.
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About 1500 miles ago, I replaced a cell in the battery pack. Now the triangle of dead is back and the code is "replace battery pack" again.
I tested all the cells and here are the results.
(the previous one I replaced was 4.5 volts, very low and easy to find)
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I currently have a 2008 Touring Package 6 with 180k and I am getting weird problems. I am getting the triangle of death, VSC, and yellow ! light. There is no check engine light. On the LCD I am getting the red battery + - icon as well as the car hybrid icon. I scanned it and I am getting a hybrid code P0A09 . All of the maintenance have been kept up and all fluids are perfect. No weird noises and the car is doing 53 mpg. It switches between gas and electric with no problems at all. Symptoms were yesterday with the lights. I cleared the codes and they would come back instantly. Today, I did the same thing and now everything is perfect. I am attaching the pictures of my dashboard lights that were on and the codes I was able to obtain in diagnostic mode.
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2007 Prius with 112k. It's getting the red triangle and check engine with code P3012. My understanding is P3012 points to 'Battery Block 2 Becomes Weak'. Battery block 2 is the 3rd and 4th modules counting from the end where the ECU is. These two modules test out the same as the other 26 modules in this pack, ranging from 7.40 to 7.46.
I got them this low by running A/C on high with car in neutral, hoping the bad module would show up. (Neutral prevents engine from charging HV battery.)
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My Prius has started throwing the code P0A80, it all happened after I went away for work and left the car in storage for 15 days, during that time I left the OBD scanner plugged in and it drained the 12v battery, a quick jump start and it was back up and running.
While I was backing it out of the driveway the warning triangle came on and the MFD said "problem" the scanner showed the P0A80 code. I thought that was odd, but maybe related to the flat 12v battery and self discharge of the traction battery so I reset the code, it drove normally to the shops. When I restarted it and started to drive it threw the same code again.
I then installed techstream on my laptop to try and get some more in depth answers but was having trouble getting that running on Windows 8. So overnight I disconnected the 12v battery and would try again in the morning.
I got techstream working and connected it up to the car, connected the 12v and started it. While I was configuring techstream to graph the pack voltages I noticed something odd, the engine was being loaded and unloaded in 2 second cycles, and at the same time the inverter was whining as it does this. I was thinking maybe it's doing some sort of charge and measure cycle since the ECU's have lost any pack data due to the power loss of the 12v battery?
It ran like this for 20 mins or so and the engine stopped, techstream showed pretty normal cell voltages, I couldn't see any wild differences between the cells.
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I'm guessing that I need to repair or replace the HV battery. But I'm not sure.
Today I drove for about 20 minutes with no issue. 10 minutes later, I got back in the car to drive again. This time, after about 20 seconds into the drive, a string of dash lights came on; Red triangle, VSC, Check engine.
The VSC light went away. But the red triangle and check engine light are still on. So, I had the trouble codes pulled by a mechanic, and the code P0A80 was returned along with a statement reading 'replace hybrid battery'.
Should I take this at face value? Or look for something else first?
2007 Prius - 150,000 miles
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So I replaced my battery about 20k miles ago, so I know that's fine. I always throw a P0420, but I'm told that's fine too. So I was driving, and I lose power suddenly. The red triangle comes on, and I plug my scangauge II in, which tells me it's P0121, or the throttle body sensor. I reset the codes to make it home - my battery DID charge just fine on the way home, making it up to a 63.5 state of charge. Now when I start it, and press the gas, it tends to rev up, rev down, and repeat. I haven't gotten the red triangle again yet but I also haven't driven it since then.
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My check engine and red triangle light came on. I checked the code and it's a battery issue. The code is P0A7F. I called the dealer and they want me to bring the car in for a check. I have about 117,000 miles on the car. They have a service bulletin open. I would like to avoid paying large dollars for a new battery.
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