Prius (2004-09) :: 2008 Won't Go Into On Mode
Nov 15, 2011
I own a 2008 Prius. Yesterday, for the first time, the car would not go into On mode. Here are the steps I followed:
1. Confirm the car is in park.
2. Press the brake pedal.
3. Press the Power switch.
The amber light on the Power switch came on for a minute and then turned off. The instrumental panel remained dark.
The green light on the Park button came on. The audio and touch screen worked, as well as the power windows and power door locks. And, I was able to drive the car in reverse and to drive forward. I only drove a few feet back and forth on our driveway.
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I have noticed that my 2008 Prius does not always engage EV mode (after I push the EV button) when the battery is green (nearly fully charged) and speed is well below 45 km/hr. Message displayed is "switching to EV mode is invalid now". So it seems there are factors at play other than the speed and the level of traction battery charge.
What these are? Is battery temperature monitored? Will the operation of the air conditioner affect it? Most times it doesn't but I wonder if under certain circumstances it might.
I use it at times if I am going up a slow speed incline, often from a standing start, knowing that there will be plenty of opportunity to recharge shortly after.
Weather here is pretty warm- around 30C maximum during the day.
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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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I have a 2004 F-150 Lariat with a 5.4. (FYI-Have not had clockspring recall fixed yet)
124K miles. Vehicle has been operated in AZ and TX only until coming to Minot, ND 6 weeks ago.
3 days ago I got an "Engine Failsafe Mode" on startup. I shut the vehicle off immediately. Started it up again and the "Engine Failsafe Mode" message disappeared, but the engine light came on and has stayed on for the last 3 days. It seems to be running ok, maybe a little rough.
I ran the reset info on the dash screen and all systems read out OK. I have not run the truck over 40 mph since, and not on the highway, but it seems to accelerate without a lot of hesitation.
I've seen in other forums that this might be a dirty or faulty throttle body and/or the dealer may be able to re-flash with updates but this is old 2004 info from newer owners back then.
What am I looking at from a time/price angle when going to the Dealer for service? I don't want to replace a throttle body if it just needs to be cleaned and re-flashed because I'm ignorant.
Anything I should watch out for? I'm not a competent mechanic!
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So i noticed, when in auto mode, whether sport mode is on or off, it does the same thing. If i floor it from a stand still, the transmission takes noticeably longer to go from 1st into 2nd then from 2nd to 3rd, 3rd to 4th, etc. 1st to 2nd takes like a good second, kinda like this:
1st VROOOOM.....................2nd VROOOM..3rd VROOOM..4th.....etc..
If I drive it in manual mode, then it shifts just as fast. So this only happens in auto.
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There had been a lot of discussion about the engine light coming on and the Engine fail safe mode. A lot of folks said the dealer could not fix it. It happened to me and my dealer fixed it. This is what the dealer did to correct the problem
EEC Tested
Code P2106
Disconnected all wheel speed sensors and reprogramed PCM per SSM 17272 and Ford Hotline
No more problems.....
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I was driving down a road tonight and my entire truck shut down, and it said engine safe mode. I lost all power steering and gas, all I had were breaks and electronics. What does that mean?
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Well my p2106 code seems to be different from all the other ones Ive read. I get the p2106 code after the truck goes into "FAILSAFE MODE" and it only goes into failsafe mode the moment the truck reaches 40mph and then loses all its power. I turn the truck off and back on and its back to normal until I go 40mph again. I scan it and only get one code p2106. The truck idles and runs perfectly until it reaches 40mph! I've replaced the entire throttle body with a new one from ford and it keeps doing the same thing. I don't want to keep buying electronic parts as they are not returnable. My truck is a 2005 Expedition with 72k miles on it
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I was driving home. Problems started after pulling away from a 4-way stop. Truck started lunging almost like I was running out of fuel. Then I got a "Transmission Malfunction" in the in dash display. Followed by limp mode. I checked the Faults when I got home. I have the following:
P0720 - Powertrain - Output speed sensor Circuit
P2106 - Powertrain - Throttle Actuator Control System - Forced Limited Power (From what I understand this is associated with limp mode. Not a root of the problem)
P0713 - Powertrain - Transmission Fluid Temp Sensor Circuit High Input
P0722 - Powertrain - Output Speed Sensor Circuit No Signal
The vehicle has around 192,000 mi. Replaced cam phasers in upper engine roughly 1000 miles ago and replaced all the bearings in the rear differential roughly 100 mi ago. I haven't messed with anything on the transmission. Checked fluid level and color of transmission fluid.
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Just fully rebuilt transmissin 4r75 replaced all planet gears clutches etc. Now with it all back together the speedo does not work on truck goes into limp mode. I replaced the vss sensor an no luck
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2005 ford f-150 Lariet goes into failsafe mode while driving on freeway. This is a dangerous situation happened ever.
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I just got an Egde Evo which I installed and everything looked great. After a few runs, I noticed the ABS light coming on an soon after that my transmission goes to limp mode (the wrench lights up).
I receive the DTC error: P2106 on the Edge Evo.
I have gone back to Factory default, but it keeps coming back, ie. the ABS light lights up and the Trans goes to Forced Limited Power (according to the Evo).
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At a loss right now. My 2004 F150 4X4 and just recently started sounding like the truck is trying to shift into 4X4 mode while driving it. It stops if it's switched into 4X4. I have taken it to a local mechanic shop I use and they said it was the Actuators and they replaced those. I got it back and the same day the noise came back. Took it back and they have had it for another week and still unable to figure it out. I even took it to another shop that was highly recommended and they say to take it to a Ford dealership. I have read that some say it could be the vacuum operated hubs? Need to figure out what it was and had it fixed?
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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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Very very odd thing happened. Driving up from Houston to Colorado yesterday. Snow tires mounted in preparation for the snow in NM and CO. Around 300 mi into the trip, the CEL (check engine light) came on. I was on cruise control, I did not notice the lack of power. Checking the battery, it was in the purple. I first opened the gas cap and screwed it back in. I figured the change in elevation or temperature may have had something to do with the CEL. Nothing. Gas tank was a quarter full.
At Lubbock, I pulled over and filled up. I played with the rubber gasket on the gas cap but decided it was going to be more trouble than I was prepared to deal with, without any tools. CEL stayed on for another 30minutes or so while I navigated through the city, covering another 20 miles or so. After a pitstop to pick up OJ, I started the car and the CEL was off.
Here are the variables:
Elevation delta - +3000 ft
Temp delta - -10F
The only thing I can think of is that the hybrid battery is getting long in the tooth (2008 MY, 103k mi), the wind in the high plains chewed through the battery power, and the long length of being in low charge got the ECU to confuse itself into thinking that the hybrid battery has bad cells, which it probably has a few weak cells.
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My 2005 Prius won't go into READY mode. This has been happening for many times now almost a month. Up until today if I let it sit there for a while (sometimes a couple of hours) it would work eventually, however, starting today it just does not want to go into READY mode. One thing that I have noticed is that when I press the brake pedal the brake lights do not turn on. I have been suggested that it could be the Stop Light Switch that causes it, and one way to check was to perform the following procedure:
(1) Push the P position switch.
(2) Parking brake pedal is depressed.
(3) Turn the power switch from off to on (ACC)
(4) Brake pedal is depressed.
(5) Press and hold the power switch for 15 seconds or more.
According to Vincent if this starts the car then it is the Stop Light Switch but I was not able to start my car even with this procedure (may be I am doing it wrong.
Note: I have checked the 12V battery and it is not the problem.
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This morning when I sit in my prius, engaged brake and pressed ON, I was surprised that the car was not starting. In fact in was in a status between OFF and IG-ON mode. The cabin lights were on, so as the head lights. The dash was lighted, but weird: the fuel indicator shown empty, though it was filled two days ago and the central screen was not lighted, so it was not the IG-ON mode in which the central screen should be lighted.
I cannot switch from the P mode, and I don't remember whether I saw the "ready" on the dash. I turned the system OFF and repeated the procedure but it was on the same situation. I was a bit panic, looking at the manual and after few minuets I decided to try again. And surprisingly it backed to normal. I drove it all the way to work and didn't notice anything wrong.
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I just recently bought a 2007 priuswith 77k miles and really love it and just 3 days ago installed the EV switch (manual button, not the coastal one) because of my plans to get it to plug in in the near future, and it worked very nice until today. No matter what i do and when i press it, it just keeps saying "Cannot change to ev mode now" doesn't matter if i push it before the ICE warmup or after. its in the range where it should be working like plenty of battery, not pushing the accelerator at any time, under 34mph, and not while the ICE is running....it was in the mid 80's today which is cooler than last 2 days. I'm just not sure what to do anymore...I do have a check engine light on for 02 sensor but it has been on since I bought the car.
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I've had my 2009 Prius II for about a year now and I have NEVER been able to turn on the accessory mode. I followed the manual and put the smart key in the slot and pushed the power button while keeping my foot off of the brake pedal but I get NO RESPONSE. I tried holding the power button down, pushing it just once, and pushing it repeatedly. I've successfully engaged accessory mode on a similar interface before (on a hybrid Highlander) with no problem.
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We got this 2007 used in June and I love it but recently I have been reading the manual and noticed the power on mode. I have tried numerous times and different ways to put it on with no luck. It powers up for ignition with no issue but I can't just listen to the radio or reset the tire pressure because it can only go into ignition mode.
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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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