Prius (2004-09) :: Cannot Get Into Ready Mode

I have a 2004 prius that sat for 2 years, I just replace a cell, worked on the HV battery and made sure it was balanced. I got the battery back in and I can't get it to go into Ready mode, I can get it to ignition on and charge the battery and into acc. I've checked several components to see if they were causing the issue.

- 12v battery is good
- brake light switch seems to be good as the lights come on when the brake pedal is pressed (but ready mode does not)
- I've checked a number of fuses
- used and obd2 adapter with torque and it is not coming up with any codes
-Edit-
- 12v battery was replaced last spring and has been maintained

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Prius (2004-09) :: Cannot Put The Car In Ready Mode After It Shut Down

I measured battery on my 2007 Prius by MDF, it's only 11.9V, charging is about 14V. When I turn on ACC mode, and Radio is on, I think it shut down the radio after about 15minutes; I cannot put the car in ready mode after it shut down. I have to jump it in order to put in ready mode. Is it my turn to replace this auxiliary battery?

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Prius (2004-09) :: Fill Up In Ready Mode - Gas Capacity On Bladder Decreased Significantly

I used to fill up with gas without shutting the car down, because I didn't see a need for it. I would disable the fan on the climate control every time to avoid having the ice come on as I refueled. I figured that because the ice wasn't coming on, I wasn't breaking the law. I've since changed my mind about this, after reading posts here on Prius Chat. I also recently noticed on the last few fillups that it seems like the gas capacity on the bladder has decreased significantly.

I used to be able to refuel the car when it was down to a single flashing pip and put 10.5 gallons in with no problem, and without overfilling. I have always been careful not to overfill. However, it seems like now I can get only 8 gallons in at the most. The capacity has decreased with the colder weather, however I used to be able to get 10 gallons in on a consistent basis without overfilling even during the winter.

Is this reduced bladder capacity a result of damage to the system, or is this normal? I have probably filled the car up about 100 times since I've owned it (odometer is around 50K now) while remaining in the ready mode.

Is there anything I can do to expand the capacity of the bladder back to normal, or will I have to live with this? Although it's annoying, I'm not going to spend the money to replace the fuel tank unless it's truly necessary.

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Prius (2004-09) :: 2005 - Engine Swapped Now Car Won't Become Ready

Im having some issues after swapping the engine on my 05. The swap went well and i hooked everything back up the way it was. I have triple checked every connection. If I am missing one then it is hidden extremely well.

I reconnected the HV and Aux batteries but the car will not go into ready mode. All the warning lights come on and the screen shows problem!
The inverter coolant pump is running, my basic obd2 scanner shows no codes.

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Prius (Gen 3) :: Car Won't Go In Ready Mode In Cold

As the weather has gotten colder (32F +/-2F in the morning), my car is not going into ready mode as consistently as it was in warmer months. I also notice that I have a much better chance of success of going into ready mode if I let the car "pressurize" for about 10 seconds prior to pressing the power button (pressurizing = whatever is going on when you open the driver door and you hear the electric noise of something working (brake pressurization) in the front of the car that runs for about 10 seconds).

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Prius (Gen 2) :: 2008 - Every Once In A While Car Refuses To Go Into Ready Mode

Basically, every once in a while the car refuses to go into "Ready" mode - it acts like you are trying to start it with your foot off the brake. Appears to be getting worse over time. Happens at least once a week. Yesterday I probably tried to start it 30 times before it finally took. Once it gets going it is fine, and often it will start right back up several times before it starts acting up again. No rhyme or reason to it.

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Prius (Gen 2) :: Can Turn Off Beeps When Put Car In Ready Mode?

When I put the car in ready, the car will beep 3 times. It's like, foot on brake and press start button, then car shows ready, at the same time it goes chirp-chirp, then beep beep beep. I'm just wondering if the 3 beeps can be turned off? I didn't find any thread regarding this beep. I did find many about turning off the seat belt beep, reverse beep, etc. and I already turned off those beeps.

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Prius (Gen 2) :: Warning Lights And Unable To Get In Ready Mode

When I backed up yesterday, some dash symbols showed up. After turning off the car, I am not able to get it in Ready Mode. Only solution so far: to disconnect the 12V battery and wait approx. 2-3 minutes. After that, the lights are off. The 12v battery does also indicates normal voltage. IG-OFF: 12.7V IG-ON 12.2 ... Unfortunately I cannot get the trouble codes with my scan tool ...

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Prius (2010-12) :: MG2 Rumble / Vibration When In Ready Mode With ICE Off

I am still getting used to my new Prius, just have a little over 700 miles on it. I recently noticed something very strange with the car - if I am in "Ready" with ICE off, and I put it in drive and release the brakes, but do not press the accelerator, the car will slowly move forward, just like a regular auto transmission. After about 1 second the speed will reach about 2 mph and I can feel a very small rumble in the cabin and a very light vibration on the steering wheel. It sounds like a very low frequency bass, and it lasts for less than a second.

It goes away and the car continues to accelerate up to about 5mph (the accelerator is still not pressed). This sound is almost unnoticeable, and it does not happen if I release the brake and immediately press the accelerator, it only happens while creeping forward very slowly. I was able to make this sound/vibration last longer by "riding" the breaks and keeping the speed around 1-2 mph, it is very faint and I have really listen to it. To me I believe it is caused by some resonance/harmonics in MG2 turning at extremely low RPM, at least it "feels" somewhat "electric"...

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Prius (Gen 2) :: Charging Voltage (READY Mode) Constant Or Varying?

The few times I monitored the 12V charging voltage with ScanGauge during driving it has been very stable at 14.0 ~ 14.1V for almost one hour worth of commuting time. Someone from another board commented that his charging voltage varies up and down and he suspects the charging voltage adjusts itself depending on the 12V battery SOC, and thus my battery may be so weak to require continuous charging at 14V.

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Prius (2010-12) :: High-pitched Electrical Humming Sound From Hood In Ready Mode

My Prius IV with about 10K miles started to emit a high-pitched electrical humming sound under the hood when it was in Ready mode. It did not have this sound before. I opened the hood and found the sound was coming from somewhere around/under the engine area. I want to know if this is normal on Gen 3 Prius? I have seen post on the same noise in Gen 2 Prius but the posts (thread) stopped without a resolution.

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Prius Plug-in 2012-15 :: Putting The Car In Ready Mode With Foot Off Brake For Fully Access Of 12V Battery?

Heading out on 4 week 3k mile road trip. Have 12v adaptors for a very efficient laptop and smartphone.

It seems that in "Accessory" mode the PIP is using only the dinky 12V battery so this is not a healthy solution. Is there a recommended strategy to put the car in semi-ready mode and reduce all possible drain so that utilizing the 12V will not be draining the traction battery reserves much at all?

I'm thinking that perhaps trying to put the car in "ready" mode with the FOOT OFF the brake indeed fires up access to the traction battery without firing up other things that require the full power monty that Ready mode with the FOOT ON the brake requires. Seems to me the PIP is a great mobile office solution if we could gain access to traction battery reserves without running much else.

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Prius (Gen 2) :: 2005 - Ready Light Does Not Go On And Start Button Becomes Orange

I have a 2005 prius with 38,160 miles I started it and shut it off and then tried restarting and now does not want to start. The ready light does not go on and the start button becomes orange.

I checked my 12 volt and it gave a reading of 12.2 volts. These are the engine codes that come up:

U0111 comes up twice
C0200
C1259
C1310

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Prius (2004-09) :: 2005 - Car Went To Limp Mode Then Stopped With P0A0F After Maintenance

I have a 2005 Prius. After driving home from a 95K routine maintenance inspection, the car (with the display indicating 50% in the gas tank) went to limp mode and then stopped entirely and had to be towed back to the dealer. The codes pulled were

P0A0F (Engine failed to start)
P3000 (Battery control system)
B2799 (Immobilizer Malfunction)
P3190 (Poor engine power).

The techs concluded that the car was simply out of gas and the display incorrectly showed I still had gas in the tank due to a broken sender in the tank. They also said they added 1 1/2 gallons, and the car ran fine again.

However, I keep meticulous records of when I get gas, and according to my numbers I had at least 5 gallons left in the tank. Sure enough, the tech topped the tank up, which only took 4 gallons, so clearly my tank was not empty when this happened.

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Prius (2004-09) :: No Startup After Aux Battery - Ready Light Does Not Appear

I have 2004 Toyota Prius 110k miles on it. New auxilary battery on it. VSC, Brake and Red triangle lights are on. The car wont start. System comes on, but ready light doesn't not appear.

If I discoonect the battery for a minute and connect it back, I am able to start and drive it. After a minute VSC, brake light comes on. I still can drive the car and it drives perfect. As soon as I shut it off, I won't be able to restart it again. I have to disconnect the battery for a minute to get it started. Inverter pump seems to be working fine.

I got the codes with the paper clip VSC 43, Brake 36. After resetting the codes, I drove the car and now it throws VSC 51 code.

Check engine light is not on. When I checked with OBD scanner, it does not show any codes. When we checked with shop's scanner, there was a code smth "LOST COMMUNICATION WITH HYBRID..."

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Prius (2004-09) :: Replaced HV Control ECU, Ready Light Does Not Come On

I replaced the HV Control ECU on my 2007 Prius, because my coding scan read POA1D. Now the lights on the dash all light up, but the Ready light does not come on.

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Prius (2004-09) :: 2007 - Ready Signal Just Doesn't Come

3x in the past few weeks it has taken 10 minutes or so to start the car. the ready signal just doesn't come. All the dash lights come on too.

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Prius (2004-09) :: Cannot Shift Out Of Park When Ready - Just Beeps Once

When I start the car and get the Ready light, I try to shift into P or R, or anything, it doesn't shift. Then it beeps once. I've tried turning everything off. Exiting, locking, unlocking and retrying.

I get the Ready light and the gas engine even starts, it just won't shift. But beeps once after I try to shift into any gear.

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Prius (2004-09) :: All Lights Come On Except For Ready Light / Car Won't Start

I recently changed out my 2006 blown gas engine with a great running 2008 engine and also replaced the hybrid battery. After connecting everything, my car won't start. All the lights come on except for the ready light. Does something have to be reset?

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