Prius (2004-09) :: Brake Pedal Really Hard And Car Slowed Way Down
Oct 16, 2013
I have a 2008 Prius. Had to do an 'emergency' stop. Put my foot on the brake pedal REAL hard and the car slowed way down, but not down enough. Munched the front end. Now remembering back, I didn't feel any 'chattering' from the ABS brakes. It seems like I got regen braking but never switched to the hydraulic brakes. Is that possible? Did I experience a braking failure? Or do Prius just take a lot longer to stop? I did a test stop in the rental car I have now (not a Prius or hybrid), and it gives me the ABS chatter as I would expect, with a short stopping distance.
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Had a lift done (Rough Country, after reading through these forums) on my 04 F150 Newer Body Style 4x4. Now, sometimes the pedal gets harder to push on until it won't go down at all and the brakes (only the front) start dragging. It goes away after awhile (my rotors are shot and I'm going to have to replace them after I figure out what is going on) but always comes back. The brake lines have been bled and I'm having a shop bleed them again tomorrow (that's what they said the issue was) just in case.
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Could my brake issue be related to my transmission problem? Neither are constant. Brake problem= sometimes the brake pedal feels hard, like there's no power brakes (I drove a car once. ..looong time ago. .. that had no power brakes or steering) but it will kick in after a short distance. Transmission prob= seemingly unrelated, is a problem shifting from 1st to 2nd gear. This has happened maybe a 1/2 dozen times, the first time and mostly when in heavy commute traffic and when going between 1st and 2nd gear because of the slow commute speed, but also at other times when not in lengthy slow commutes. When it doesn't shift, the odometer doesn't work (shows only dashes) and an engine light comes on (the sprocket/gear looking one). Usually the transmission will eventually shift and the light goes off.
I read that the brake problem might be a vacuum hose problem? Something about a booster? Is this dangerous? or is it like having a car w/ no power brakes? Going to have my transmission looked at this week. Read on another site about dropping valve seats on this year car. If there's a major transmission problem, I'm wondering if it's worth fixing? I changed, timing belt, water pump, front and rears brakes, tires. 143,000 miles.
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I was driving my 2008 Prius and it abruptly slowed down and became undriveable. I had all of the warning lights - the red triangle master warning light, hybrid system warning light, and the check engine warning light. The car had to be towed home. The gas engine starts and runs - driving forward feels like the brakes are on - will not drive in reverse,. I checked the codes and had the following : POA1D, POA78, POA90, and POA94.
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I have a 2007 Prius with ~180000, which runs great. The mechanic shop I used for oil change suggest me to change spark plug because they are dirty. After the change, I found I cannot step on the gas pedal too hard for acceleration. The car will hesitate, choking or die if I try to accelerate too fast. But if I step on the gas pedal gently, and let it reach the desired speed in a slower way, it has no issue. I went back to the shop and they replaced with another set of 4 plugs, and no improvement. I checked air intake tube and it looks no leak, but really old. Other than that, the car runs great.
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My 07 has 149K on it and I never have checked the oil. I do have it changed every 5K and no one has ever mentioned it coming in low. My last oil change was at 145K and about 2000 miles later the master warning light would come on when I slowed down fast, especially if there was a turn. I noticed this on the twisties driving up the west coast. The problem then went away after a couple hundred miles. Then recently it started doing it again and so I checked my fluid levels everywhere just in cast that might be throwing the warning light and found my dipstick was bone dry.
I am surprised the warning was so general. Why not an oil light? or an oil pressure warning? WHen the master light came on, the screen just said "problem". Kinda vague for such a specific and important matter. My guess is that the oil got so low that the oil pump sucked some air due to the acceleration when cornering or stopping. (negative acceleration).
My question is what would make it start using oil suddenly. True I didn't check it b4 so I have nothing to compare it to, but as we all know, the Prii do not use much oil and if in fact it was so low that it was sucking air 2000 miles after an oil change, they either forgot to add oil or else it started using the 1 qt/ 600 miles that the owners manual tries to tell us is normal. I seriously doubt they shorted me on the last change. BTW I added some oil ....
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My car had slowed down when I pushed the gas pedal. I had to get towed. White powder was on the face of engine. Car will not crank. It makes a humming sound. Kia 2004 spectra ex....
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I was driving my 2008 Prius and it abruptly slowed down and became undriveable. I had all of the warning lights - the red triangle master warning light, hybrid syatem warning light, and the check engine warning light. The car had to be towed home. The gas engine starts and runs - driving forward feels like the brakes are on - will not drive in reverse,. I checked the codes and had the following : POA1D, POA78, POA90, and POA94.
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My friend has a prius and had her brake pedal sawed off modification. Funny cause she says that her foot is always slipping off the brakes now. It was always a bogus fix, to fix nothing caused by errant drivers.
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I have another small issue with my 2004 Prius. I just noticed yesterday that the second I very lightly depress the brake pedal, a little clicking sound is made down below. It sounds like it might be coming from the brake pedal itself or somewhere underneath the hood. It's only when I depress the pedal slightly and it makes pretty much the same sound when I release the pedal. I just had a 5000 mile service done to the car and there were no issues then.
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I was going down the highway at 70mph and came up to a toll booth when the brake pedal went to the floor and the car wouldn't stop. I hit the pedal hard and the car stopped in a very jerky manner as if the abs was initiated. I looked at the dash and the ABS, (!), and brake lights were illuminated. I turned the car off and then on again and the lights were off and the brakes worked normally again.
The Toyota dealer in CT said the weak battery was causing an under-voltage at the stroke sensor and replaced the battery. They told me if I lost my brakes again (!) I should bring it back for a new stroke sensor. In hindsight, I should have just told them to go ahead and replace the sensor. Two days later, driving down Florida route 301 in the rain, a stoplight went from yellow to red in about 3 seconds so I hit the pedal hard. The back brakes immediately locked up, the front wheels kept rolling, the car swerved and slid through the red light intersection sideways.
I counter steered and slid between two cars at the other red light, on the wrong side of the road as I straightened out. The car swerved and slid sideways again in the other direction and then spun around so I finally wound up in the correct lane, and I drove off like nothing happened. I was doing maybe 35-40 at the time and it's a miracle no one got hurt. Again I look down and see the lights illuminated. I cycled the power switch as before, and again the problem went away.
About an hour later the problem came back and this time no amount of power cycling will clear it. Basically what I'm understanding now is that it's the regenerative side that doesn't work with the bad sensor. The hydraulics kick in at around the last 10% of the pedal so the car will still stop, but I have to floor the pedal and that makes the car think your trying to lock up the wheels so it initiates the ABS system which makes stopping jerky and unpredictable. BEWARE the stoke sensor!!! What a dangerous design!! The dealer has the car now...
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I can press on the brake pedal when car is off or on and there is a kind of quirky sound made. I can hear a pump sound and then a squeaking or quirky sound. It happens every time I press the pedal when it is stopped, either on or off.
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2005 with 110K miles. Had oil change about 2K miles ago, tires rotated about 1K miles ago. I was at a stop light when I felt a little movement in the brake pedal and the lights all came on. Brakes continued to work, but somewhat harder to push the pedal. When first applying the brakes, there was a very slight wandering of the car, which was easy to correct.
I drove the car home and turned it off. About an hour later I started it and the problem was gone. I took it to an independent garage the next day. Their scan tool found C1357 -- decrease pressure solenoid fault -- but could not go further into sub codes. They recommended that I take it to dealer.
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I've a UK 2004 gen ii with 69000 miles on the clock. When coming to a stop and also when at a stand still if I press down the brake pedal I get a rather loud creaking sort of noise. I guess that's friction brake related as no noise with using brakes when driving. Also a high pitch squeal when driving and turning steering wheel slightly to the left that stops when you press the brake pedal.
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2005 Prius, 50K. Newly purchased two weeks ago. Last night, driving into my garage with the ICE off, noticed a noticeable electric or electronic-sounding hum from the engine compartment. With the hood up and looking toward the engine from the front of the car, noise comes from the right side of the engine compartment, to the right of the inverter cover.
The noise, a loud hum, appears when pressing the Power button and the brake pedal. It also appears when pressing the Power button twice without pressing the brake pedal. When starting up the car, the hum lowers in pitch significantly (though not in volume) as soon as the Park button is pressed.
When I bought the car, I brought it in to the dealership for a complete checkup. They replaced the inverter coolant pump under the recall notice. Don't know if that's significant. I opened the coolant reservoir cap last night with the motor on, and noticed movement inside, so it appears to be working fine.
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A few days ago, while on a road trip from CA to CO, I noticed a loud squeak from the engine compartment every time I pushed the brake pedal, no matter how lightly, no matter what speed. It even happened when the car was off. I have almost 60K miles on my '05.
When I arrived in Denver, I dropped the car off at a Toyota dealer for troubleshooting. They isolated the fault to a bad ABS actuator. They had to overnight the part, and spent a day and a half installing it. Sounds like a major project!
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I have a gen II Prius 2007 with 115,000 miles on it ...
When I use my brakes at low speeds under 15 mph, there is a bit of extra brake travel before they engage properly ...
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The switch for the parking brake pedal light self loosened (a known issue with this switch) over the past six months and today it finally fell off the pedal assembly. The only way I can see to do the repair is to remove the three fasteners that attach the parking brake pedal assembly to the dash and drop the pedal to the floor to refasten the switch. It appears to be possible; however, there are lots of stuff around the assembly that might get in the way of dropping the assembly so I raised the white flag and called it a day.
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2003 - I tried to change the brake fluid with a MityVac. I've done it to dozens of cars with no problem. With the Prius it didn't take it well as I have to pump the pedal sometimes to stop or the pedal goes way down. Only now I read about how a special Toyota scan tool is recommended to do it. Is there any other way? I only really did the front brakes since after trying one rear wheel cylinder and getting nothing out of it, I quit. The dealer wants $165 and I'm sure that doesn't include any extra shop fees and such they tack on. What other way can I try before taking it in?
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I've a problem with an 2005 V10 Tdi.
The brake pedal goes hard after 2 or 3 presses like the servo has stopped working.
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I started my 05 prius this morning, and it starts up and is running in normal time. But there's a constant long beep tone that doesn't shut off and after it starts it shoves the break pedal back out while my foot is still trying to keep it depressed. There's a brake light that is on after, but no error icon on the display. I didn't try driving it to see if it lets me, because of something possibly wrong with the brakes. What might cause this?
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