Sonata I45 (YF - 2011+) :: Hard Brake Pedal Before Starting Vehicle
Jul 11, 2013
I am experiencing a hard brake pedal about every other day if the car sits overnight. I know I am not depleting the vacuum supply before I exit the vehicle by pressing the brake pedal. Some mornings the pedal is very hard and barely moves and other mornings it's normal. My brake booster vacuum check valve hose assembly was replaced to try and fix the problem but it still does it. I also know my electric vacuum pump works correctly. Is it normal? Do I have a small leak in the brake booster vacuum diaphragm? I have no other brake feel issues.
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I tried to turn on my car, and the brake pedal was hard and the car wouldn't start. I did a search on the forums regarding the brake light switch. I tried the 30 second hold the start button, car would not start. Radio/lights works fine so I don't think it's a battery problem. My g/f said she can see all of my brake lights turn on when I try to depress them. I'm kind of a lost. It was working fine earlier this morning.
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I have noticed that anytime i leave the car parked for more than 5 hrs or so, when i get in and put my foot to the brake pedal to start, the pedal feels very hard... as tho someone sat in the car and pressed it several times.... So great force is needed to mash the pedal to start the car... After it starts the pedal gets nice and soft as normal... Is this normal?? Or should i get it checked
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My brake pedal is rock hard to press and when I do press it while pushing the push to start, it does not turn on.
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I have 2011 SE, it won't start at all. The car won't start all thou all electrical are working (radio, NAV, Dashboard) but when trying to press the break pedal is hard as a rock. Dashboard computer at times tells me to press the break pedal - but it wont start, it actually turns off when i press the break and hit the start button. It happen twice before was able to start it within couple minutes.
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I have the limited with the push start. In order to start the car, you have to push the brake in so far and then push the push button. Lately the brake pedal is really hard to push down after its been sitting for an extended period. Once its started, all is fine. Its almost like I've pumped it a few times first, but its not the case.
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So, I have had this weird incident happen a couple times. The first time it happened was probably a month or so after getting the car (2013 Sonata 2.0T Limited). I was parked on our driveway, and it's on an incline. I started it up, but the brake pedal was super hard to push down. Once the car started, everything felt fine, and other than a casual "Huh, that was weird." I didn't really think anything of it. Have been without incident for months.
Then today, it happened twice. Parked in the same spot, started the car fine this time, but I went to turn it around in the driveway and almost took out our shrubs because I went to brake and the pedal was stuck. Pushed down really hard and got the car to stop. Put it in park, and tested the pedal a couple times... everything was fine. Was nervous, but took the car anyways. Happened again in the afternoon. Got out of the store and thought I was going to be stranded in the parking lot because this time the pedal was stuck and at first I couldn't start the car. Luckily, it eased up when I pushed down hard and it started, then all was fine again.
I have done a little looking and saw vacuum booster and master cylinder mentioned for possibilities, though no one's experience that I have seen sounds just like mine, nor did I find any that are Sonata YF specific. I already got my switch recall taken care of, so this is something different. Only 7,000 miles on the car. Gonna bring it in to the dealer this week, but just wanted to crowd source opinions in case they can't replicate the problem. I hate feeling like I can't trust my vehicle... especially when it's almost brand new.
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Have a 13 Sonata Limited 2.0t and for some reason it won't start.
Also brake pedal is extremely stiff. Tried to push start button several times while pressing brake, and dash lights just blink several times.
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Had this issue with my Kia Optima 2013 pertaining to the brake pedal, now with my 14 Sonata Limited. When in stop and go traffic, parking lot driving, or pulling into the garage that requires a lighter touch on the brake pedal, the pedal has a creaking feel to it, like when closing a creaky door. I can make this happen of course when I push the brake pedal slowly with my hand. This also happens when letting up on the pedal slowly/lightly. Kind of annoying, but the brakes work just fine and dandy
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A month ago my ESC light started coming on and the dealership replaced the brake pedal switch per the recall.
Here in the last week or so, I've noticed the brake pedal is very sensitive now and will sometimes stick causing the brake lights to say on after the car is turned off.
Pushing on the pedal just a little bit (pushing down maybe less than 1/8") will cause the brake lights to turn on and also kick the cruse control off.
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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 have a 2014 Sonata GLS. This has happened 3 times so far. I often drive around looking at houses for sale etc. Sometimes I drive for 1 to 2 hours, usually low speeds under 20 to 30 mph.
So I come to a stop, start to accelerate and notice my transmission is having trouble engaging, I liken it to transmission slip, like winding up to get the vehicle to move. I also notice my dash gear indicator light is blank. No "D" in the display box, just empty. I stop at a safe spot, put the vehicle in park.
It will not release from park when I try to shift into gear again. I decided turn the vehicle off, re-start the car, and all is well, tranny works, dash indicator is back and all is good.
I drive the vehicle mostly at highway speeds to/from work with no issues. Each time this has happened its after driving at that low speed for at least an hour and a half or more. I haven't taken it to dealer yet.
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I have a 2011 Hyundai sonata and my steering wheel and body of vehicle vibrate either when I'm in idle or when I stop at a red light and once I let go of the brake and accelerate It stops. What can I do?
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Nissan Rogue SV 2011 is keyless entry vehicle. When using remote starter, the engine shuts off when brake pedal depressed and the car is restarted to drive away. does this 'turning off/turning on' the engine damage any of the systems of this vehicle. it just doesn't seem a good idea to have the engine turned off and then immediately turned on.
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2011 Camry LE, 76k, new alternator, stars well cold, battery good, runs well... Just takes longer to start after its warm, cranks well, engine turns over well, idle great....
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This started out as an intermittent problem after I would run the a/c for a bit. Now it happens every time I get in the van regardless of if I turn on the a/c. The engine begins acting like I am pressing the gas pedal, but not flooring it. I have to press hard on the brake in order to get the vehicle to stop because it is trying to race ahead and I don't have to press the gas until around 45 mph. What in the world is going on with my van? If I throw it in neutral it just goes nuts. I have been pulling over, shutting off the van, waiting a few minutes, and then cranking up again. It could take a couple of minutes for it to start again or it will do it right away.
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I have a 2004 Hyundai Sonata and when I refuel the engine is hard to start. Once it starts everything is normal until the next fueling. I've Googled the problem and the most logical result I've seen is that the evap system purge valve might be stuck open. This causes a flooding situation which is how my car acts and if I press the accelorator to the floor when starting it fires right up. Does this diagnosis sound accurate and what would be involved to repair it.
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Very recently the brake pedal in my car has been stiff (won't depress all of the way down) after starting up the car when it's been sitting for a while. It takes a few presses of pedal for it to feel normal again.
I did some research and turned up a vacuum leak as a possible cause. I also wondered if a flush/bleed would be a possible fix for something like this.
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Requiring that the brake pedal be depressed in order to start the engine can be a nuisance, say if the driver is out of the vehicle and the passenger wants to start the engine to run the A/C, etc.
There is a workaround though. Press the engine start switch once to go into ACC mode, then press and hold it for 15 seconds and the engine will start without the brake pedal having to be pressed.
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I'm on a road trip and was taking off this morning when my CEL, vehicle dynamics control light came on steadily, with a flashing brake light. It's Sunday and no repair shops are open and I need to drive from CO to S. Cal today. Is it safe to travel? From what I've seen, it could be a problem with the gas cap or ABS is disabled. Haven't had cruise control light come on (yet), but haven't tried driving anywhere.
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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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