Prius (2004-09) :: VSC Warning Light Came On And Won't Go Off - Code 34


Dec 18, 2011

I nearly killed my 12v battery this week when I left my dome light on in the Airport parking lot. When I got back to the car I was able to pop the hatchback, but there wasn't enough juice to start her up. I was able to get a booster pack jump and it looked like everything was fine (didn't even lose the radio presets on the aftermarket deck). I had a long ride home to charge the 12v battery up. I changed out to the Optima yellow-top a couple years ago, so I'm not too worried about the battery being crippled. I've gone into the onboard signal menu and the battery voltage is well within spec idle and under load after a few hours of driving recharge.

Low and behold, the next day the VSC warning light came on and won't go off. I am NOT getting the brake (!), red triangle, or ABS warning light as others have received with 12v battery issues. I put on the OBC scanner and pulled no issues. I jumpered pin 13 TC and 4 Gnd on the interface to get the flash codes and sure enough, I'm getting a 34 code on the VSC system. I have been unable to clear the code via tapping the brakes.

What a VSC 34 is and how to clear it?

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I have had a 2007 prius for about a year now. Great little car. Today the warning light, and VSC light came on. Then the ABS light and the car would no longer go into gear. We had a diagnostic and the two codes that came up were 1121 and 1116.

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Prius (2004-09) :: 2005 - Master Warning Light / Malfunction Indicator / VSC / Brake Warning Light Came On

In my one-owner purchased-new 2005 Prius w/ 74K miles and w/ no maintenance/accident history other than doing all scheduled maintenances at Toyota Dealers along w/ recalls applicable at each time (other than we had Toyota replace the 12V battery last year just because I knew it would die at some point anyway and I don't like pushing my luck; I'm not 100% certain if there's been a recall on any water pump for this car and if so, don't believe the dealer has mentioned it), I have the following indicators which appeared all at once while I was driving along at around 45 MPH in no unusual circumstances (80F, dry afternoon, about 30 minutes into a trip of mixed speeds, no loads in the vehicle, no effect on the car while driving):

From Left to Right on the display:

1) Red Triangle - Master Warning Light

2) Orange (Symbol)CHECK - Malfunction Indicator Lamp

3) Orange (!) - Brake Warning Light (but it didn't highlight the word 'Brake' in red)

4) Orange VSC - Vehicle Stability Control Warning Light

On the Screen:

Orange Car w/ the ! symbol - Hybrid System Warning Light

We immediately aimed for the house (about 5 miles away); the car drove perfectly fine, with the engine stopping and starting at lights as needed, with speeds going from the 55MPH we were traveling at the time of the alarms down to 0 and back up thru 35/45 MPH and such per normal off-interstate driving. The battery currently shows all the blue bars, and the engine and hybrid systems showed charge/discharge as usual as we drove. There was no discernible change in the driving reaction of the car to brake, steering, accelerator, etc.

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I received my Mini VCI and sure enough the code was P3140 off of the hybrid ECU. My little bluetooth OBD2 scanner and torque just wasn't enough.

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Prius (2010-12) :: Airbag Warning Light Code B1826

Several weeks ago my 2010 Prius (actually bough 8/09) started displaying an intermittent airbag warning light. This is the red one on the right side of the display. Brought it in to the dealer, as the warranty on the SRS system is 5 years. They charged me a diagnostic charge of $96.00 because they claimed that although the SRS is covered under warranty, the diagnostic system was not. They did the work, and should get paid, but I am still after Toyota to pay them, and refund me. In any case the diagnosed code was B1826, which is an open in the side squib left hand circuit. In other words, a poor connection, or one with more resistance than the computer expects to see. They recalibrated the system and claimed it was fixed. However, two weeks later, it's back again.

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Prius (2004-09) :: Warning Lights On / Code U0100 - ICE Does Not Fire Up

Driving home today, my prius threw the triangle and all the other warning lights. Scanned with my scan gauge got code u0100. I was only a mile from home so attempted to drive it. Car made it 1/4 mile and then died. I had it towed to the house and checked the grounding wires going to the engine and transaxle. The Tranaxle grounding wire was loose so i pushed it together tightly. The car now runs on main battery only, the ICE does not fire up. All warning lights are still present. Nav screen says problem. 12v is good.

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Toyota - Prius :: Warning / Check Engine Light Came On - Diagnostic Code P3006

I need to get my 2002 Toyota Prius inspected. The Warning/check engine light came on so I ran a diagnostic (OBDII) on it and came up with P3006 Fuel Air Metering Auxillary Emission controls. What does this mean? Previously codes indicating cylinder misfire came up but those cleared.

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Prius (2001-03) :: Warning Light Came On / Random Engine Misfire - Code P0300

Had this code show up after the warning light came on and then the light went away after two day, the car seems to be a little sluggish now. I have read that this is a random engine misfire and it could be a bad plug..

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Prius (2004-09) :: P3009 And Info Code 526 With Warning Lights Diagnosed

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The guy I bought it from did say he had replaced the water pump recently. Toyota kept it for a week trying to replicate and couldn't, and even had the regional rep look at it.

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Prius (2004-09) :: Warning Lights Appeared With Error Code P0a80

Bunch of warning lights appeared and the dealer said it's code P0a80 and they recommend replacing the battery. I'd like to try to fix this myself and would like to hear your thoughts...

Plan is to check the traction battery for corrosion and use a voltmeter to test the cells and replace if needed. Prius 2004, 158,000.

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Prius (2004-09) :: Warning Triangle Came On And Scanner Show P0A80 Code

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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Lexus RX 2004-09 :: Low Oil Pressure Warning Light Blinking Then Stays On - Error Code P0346

I have a Low Oil Pressure warning light on. When it first came on, I stopped and check the oil level. It was low. I had to replace the oil 2 or 3 months ago, but then I had na accident (rollover) and just this past week i received the car and forgot to replace the oil. So that's what i did. Replaced the oil and filter.

The lights still comes on after driving about 3 or 4 miles. It starts by coming On and OFF a few times. Sometimes just blinking, than it stays ON until I shut of the engine. What it could be?

After the referred rollover, the engine shut off, but I turned it on less than 30 seconds after this (I know I shouldn't have done that) and drove for about a mile. Do you know if that would damage the engine or oil pump in 132,000 miles RX330?

I checked and found this error code P0346 (Camshaft position sensor). Would it be related?

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I keep getting the C1344 and all the lights. I checked and changed the rear shoes and the light keeps coming back, although not immediately. It takes just a little while.

I didn't notice any signs of leaking fluid, though I was able to squeeze the LH wheel cylinder in pretty easily by squeezing on the top of the shoes. The drums were not scored and were in spec so I didn't turn them. I never cracked any brake lines loose.

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Prius (2004-09) :: 2006 - At Start Up Master Warning Light / Brake Light Comes On

We recently purchased a used 2006 Prius. The vehicle has approximately 74K on it now. Well the other day my wife went to leave work and pressed the power button while pressing the brake pedal, and the Master Warning Light and brake warning light both came on. The car would not allow her to shift the car so she tried to turn it off and it wouldn't do that either. After about 5 minutes she finally got the car to turn off, and when she restarted the sequence everything went back to normal and she drove home fine.

We called 2 dealers and they both seem to be confused by the symptoms, but one thought that maybe the battery was old on the transmitter. So thinking that might make sense I replaced the battery with a new one.

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Prius (2004-09) :: Master Warning Light / Red Triangle Exclamation Point And Check Engine Light Came On

My wife and I own a 2006 Toyota Prius that we bought used 2 years ago. a couple of days ago, the master warning light (red triangle exclamation point) and check engine light came on. I took it into the dealer and of course, our hybrid battery was dead - battery and a new ECU required.

Our car is at 99,000 and 32 days out of warranty. Went down the road to atlanta hybrid repair. they were incredibly nice, and said that my computer was fine, but the battery would need to be replaced.

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I was driving down the road and the VSC warning light came on with the check engine light... What could be wrong should I have it tow to the dealer!

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Prius (Gen 2) :: 2004 - Red Triangle Warning Light Came On And Went Away?

The red triangle warning light on our 2004 came on and went away again It has 100k miles If I take it to the dealer can they pull some codes and figure out why it turned on We have to drive the car to 600 miles for the upcoming weekend and I don't want to be stranded on the side of the road The car has 103,000 miles We just replaced the 12v battery so I know that is OK

I also saw the following things to check. Is there anything else we should check?

1 - Are any warning lights on besides the red triangle? For example, the red BRAKE light, the amber ABS and VSC lights, or the amber circular icon?

2 - Did you check the brake fluid level? If low, buy a new container of DOT3 brake fluid and replenish as needed This fluid will dissolve paint, so do not spill it

3 - While you are at it, check the radiator and inverter coolant levels by looking at the translucent reservoirs behind the radiator and next to the inverter If low, fill with Toyota Super Long Life Coolant

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Prius (Gen 2) :: 2004 Red Warning Light Flashed Per Second, Once Per Day

It was driving me crazy that the red triangle warning light (master warning light) flashed for only a split second, once per day, two days in a row.

I drive 100 miles per day. My 2004 Prius has 136K miles.

It turned out to be low motor oil level, 1.75 quarts low.

My car is burning about one quart every 5K miles which probably is within the normal range for a 136K car.

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Prius (2004-09) :: Master Warning Light Comes On And Off

I was driving earlier today and it flashed twice (about a second and a half each), and then didn't see it again for a few hours. I was going about 40 MPH at the time.

I was driving somewhere else today and when I got to the 70MPH mark (really, between 60-70), it objectively increased in frequency. I searched google and these forums, and the closest thread I can find that shares my ailments was this one:

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Prius (2004-09) :: VSC Warning Light Came On, Car Won't Start

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Mileage is just under 25K.

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Prius (2004-09) :: Master Warning Light Came On

So the other day my girlfriend got in her car and it had the master warning light on. we took it to the dealer and now they are saying it is something with the transmission and it would be cheaper to just install a new one. Another thing is how could it be the transmission if i drove it over to the dealer and head no problem with the gears changing, but he also said something about a voltage leak.

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