Sonata NF (2006-10) :: Hesitation For A Second Or So When Floor The Accelerator
Apr 22, 2011
About once every 4-6 months or so, when I floor the accelerator, my Sonata behaves in a very odd way. Instead of the typical surge of acceleration, it actually hesitates/decelerates for a second or so, then kicks in like normal. This is so pronounced that I lunge forward in my seat a bit before it kicks in. I've not yet been in a situation were this behavior has endangered me but it is quite disconcerting when it does happen. Obviously this is not something that is repeatable in a manner for any shop to diagnose. There is no CEL and it occurs so infrequently that I'm not that concerned about it yet. The only consistency about this is that this occurs while driving around town after I've slowed down to around 5-10 MPH approaching a light, taken a right turn and then attempt to accelerate into traffic. Since I'm usually in a turn lane, I'm out of the way of traffic and can adjust to this situation without any issues to either myself or the traffic around me.
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It was the throttle body thing, cleaned that completely. Replaced the pedal with one from the bone yard. No change after clearing codes, the check engine light comes back the second you touch the pedal. Have a new (reman) throttle body coming tomorrow as I may have dinged it up after cleaning it again, I took it apart to see if I could see anything obvious.
Cleaned the carbon tracks inside and bent the brushes up more to contact the tracks better. I doubt it liked that. It was throwing a code for high current, but now that has disappeared. However, I used to be able to rev it up to 2500 rpm, now nada.... So I am left wondering if this is a bad ground or something? Bad wiring to the ECM:?
I would love a schematic showing where any relevant grounds are, pin out voltages etc. It is -15 here. The closest I've come so far: [URL] ....
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Just got into my 2006 Sonata V6 this morning. 120,000 miles. Drove last night, no problems. Started her up now this morning, noted check engine light and ESC lights on.
Pushed accelator pedal, no increase in RPMS at all. Put the car in gear (auto), car moves forward and backward, but pressing the pedal doesn't increase the rpms at all, so right now its not driveable. Luckily, its in the driveway so I know it could be worse. Took floor mat out, no interference issue there.
I changed the starter solenoid and that was over 45,000 miles ago. Never had that problem.
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I have a 2010 Hyundai Sonata GLS 2.4L. This problem started several weeks ago. When I turn on the ignition on the car, I hear a squeaking noise coming from the engine initially. Once the engine warms up, the squeaking sound lessen but does not go away. When I shift my automatic transmission to DRIVE, and press the accelerator, I hear squeaking noise coming from the engine again. I stopped my car and opened the hood. I could hear the squeaking noise coming from the front left of my car, if you are facing forward the front of the car. I do not know much about cars but I think it is coming from the fan belt/serpentine belt, or possibly alternator but I am really not sure.
Presently, the sound has gotten worse so I want to fix this as quickly as possible. I am second owner and the mileage on the car is 45,550.
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I have a problem with my sonata NF 2006 the check engine light turn on like 2 days ago and give me the p2128 code say Accelerator pedal Position Circuit - High Input something like that i cheek all the cable off the throttle body to the ecu and i don't see any cable broken how I can check the accelerator pedal sensor? I see in one page a texting the sensor whit a multi miter but was for santa fe and the cable don't have the same colors . I need the accelerator pedal cable diagram and i don't have it ....
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When I press the brake pedal, the car will stop. But if I keep pressing it while the car is stopped, the pedal wants to keep going towards the floor. I have to press hard for it to do this. I have bled the brakes. I've checked the calipers and the hoses for leaks and don't see anything. The master cylinder is topped up and I don't see any fluid underneath it. It doesn't appear to be leaking. The funny thing is, when I turn the engine off and press the pedal, the pedal comes to a stop and doesn't want to move after I pressed on it as hard as I can.
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I have a 2007 Sonata GLS 4cyl. Anyhow lately my brake pedal is going right to the floor. The brakes seem to work fine, but if I keep constant pressure on the pedal it will slowly go all the way to the floor. My rear rotors and pads have been changed a couple of months ago and I'm pretty sure my front brakes are good. What could be causing this? I also checked underneath the car for leaks and there doesn't seem to be anything leaking underneath.
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I have a 2010 Sonata GLS 4-cylinder approximately 124K miles which has been hesitating on hard accelerations for about 8 months. It will usually do this when getting on an on-ramp for the freeway or if I need to do a U-turn and get up to speed quickly. What happens is I punch the gas and the vehicle acts as if it's not getting any gas and hesitates or stalls and then it finally takes off. Usually I see a cloud of grey/white smoke behind the car enough that I am unable to see any cars in my rear view mirror.
I do not seem to see a difference when the vehicle is warm/cold. I do not have a CEL nor have had one. I have replaced the MAP sensor, PCV valve and spark plugs (properly gapped). I have done a compression test and am getting roughly 180-185 psi per cylinder. I am not experiencing any oil loss/coolant loss, do not see any oil in the coolant or gummed-up or oily spark plugs. I have also replaced the transmission fluid, doing a drain and flushing the torque converter. I have also cleaned the throttle body, and am using a new air filter and the oil has been changed within the past 1000 miles.
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2006 Sonata 3.3 liter engine with 123K miles. While driving between 30-40 mph, when I "feather" the gas pedal the car will shudder. It does not happen every time but it usually happens a couple times when it does. I see no change in rpm, transmission fluid is at a good level.
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Ok, got a hesitation when the engine is cold, almost feels like a miss. Dealer could not find anything and there are no engine codes. They wanted to replace the plugs with new platinum plugs. I said did you pull any plugs, not that is what the tech said it could be. Could it be the Mass air flow sensor? Or a coil. After a mile or 2 it is fine. I switched to shell premium since dealer told me I had to get a decarbonization from using cheap gas. I used exxon regular and BP regular with a treat of premium every few tanks. But now I am on shell and they said I needed another decarbonization, This is getting rather expensive, I may go back to my local mechanic once the warranty is out. But the hesitation puzzles me.
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Doesn't happen all the time but when it does it is obvious at 45 mph. Not there at no load on engine. No code shown.
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My father has an 05/06 4cyl Sonata automatic that he keeps in good shape. They commuted a fair distance before they retired last year, so the car has around 70k miles on it. He'd mentioned to me a few months back that it had a bit of a transmission hesitation when cruising at a steady 75-85km/h. I'd forgotten about it until I drove the car the other day...
What happens is that after cruising for around ten minutes at steady speed, the transmission begins to 'stutter'. It's not any huge event, but it's almost as if the engine was misfiring, which is the feeling you get. A small stuttering as power drops for a few tenths of a second, then comes back, then drops again, repeatedly. What he tells me he does to get away from this is to decelerate to a lower speed and hold there(~70km/h or lower) or repeatedly accelerate and decelerate gently from 75km/h to 85km/h. Both of these worked. I also found a third solution, that if you move the gear selector from 'D' to the 'manual shift' mode (it usually goes to '4' in these circumstances) the problem disappears and the car drives fine. Regular upshifts and downshifts are fine in both automatic and manual modes, and the fluid level is normal.
What burns me is that he'd taken the car in for servicing before the end of his regular warranty period and was told, "Oh, that's normal. They ALL do that. It's just the computer trying to re-learn how you drive." I can't STAND how dealer techs try to take advantage of people like this. Yes, the ECUs self-learn and yes there can be dramatic issues when a new ECU or transmission or whatnot is installed until it happens, but this kind of thing doesn't happen 'out of the blue'! I told him to take it back and put the screws to 'em that they should fix it under warranty since that's when the problem was reported. Otherwise, push them for a really good deal on a new Sonata Turbo...
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When I lifted up my floor mat today while vacuuming it was wet under the mat. I'll have to get pictures later but I spent a couple hours tracking it down. It is originating somewhere up by the rear window and tracking itself down to a non complete seam sealer job in the back seat. I'll probably have to look a little closer at this area also WATER LEAK. Trying to figure out water leaks sucks!
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I just purchased a 2009 Sonata with 78,000 miles. Car appears to be in great condition. I am using the air conditioner alot. I noticed the other day that there was significant moisture under the drivers floormat and the carpeting was damp. I let it dry and put the mat back down. That was about 5 days ago. I checked it again today and it is damp again. The car has not been in the rain during that time. Neither the carpet or the car smell damp or musty. What could be causing the moisture? It is only on the drivers side.
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Relative owns a 2007 Sonata 3.3L V6 (58k or so), purchased from in-laws so no warranty, unfortunately. Recently, in cold weather the car has developed hesitation issues upon start up, ESC-Off light illuminates and CEL. Has to restart for somewhat normal operation.
Had a chance to look at it today and CEL had already turned off and only code stored is P2135.
Researching issue (mostly here, so thx!), looks like TPS is faulty and can be replaced separate from throttle body to save $.
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My Sonata has developed a hesitation when accelerating from a standstill. Sometimes the symptom is worse. I haven't identified any correlation of this symptom with any other scenarios.
Symptom : When at a stand-still, lightly pressing on the gas pedal doesn't result in corresponding slow acceleration, it is only after a certain threshold (of throttle application) has passed that power from the engine is transmitted to the wheels. When this occurs, the result is a jerky start.
In other words, trying to feather the gas pedal to allow a gradual and smooth acceleration from stand-still is not possible when this issue occurs.
I believe the 09' Sonata has a drive by wire throttle correct? If so, could this be a computer calibration issue?
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So I took the pads off and saw pistons that push caliper against rotor were to far out to install new pads. (rear pads were still intact, both front pads were out when i pumped) So im pumped the brakes thinking it would reset them and alls it did was push the fronts out more.. I noticed fluid leaked out of the pistons after fully pushing them out.
After seeing that pushing the pedal only pushed them out and didn't reset them, i pryed them in with a C wrench. Was quite difficult but managed to do it. Note I only did this on the front pads..
Rear was just fine, piston went back in easily. I filled brake fluid fully and still does it - Now pedal hits the floor when i first hit it and seems very light when braking.
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i have a 2006 sonata v6 3.3 couple off days water in my radiator started to finish every morning I have to refill it again I haven't noticed any leaking near the engine or under the vehicle but when i drive around i noticed a steam is coming out of my air vent though the air condition is off and the temperatures of the engine rises when i tried to open the radiator cap it was already empty i checked around inside the car i have found the floor mat in the passenger side is wet
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I have a 2007 3.3L Sonata.
The car has been sitting for around 8 hours. Wh en I start it, the idle moves up and down about 100rmps. When I drive off there is a slight hesitation until I have driven for about 10-15 minutes. The idle is nice and steady after the too.
If I use a fuel system cleaner, it appears the car is fine for awhile and then the issue comes back.
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I bought a used 2008 Sonata GLS with 65K miles 2 years ago. It's been a great car so far. For the first 25K miles that I drove it, it had good pickup and got ~30 MPG for my highway driving. In the last ~5K miles, the fuel mileage has dropped to 25MPG highway and it has some hesitation when accelerating, especially on lower RPM's. I changed the spark plugs with NGK Iridium, but it is still having the issue. What to check?
Some possibilities: ignition coils, sensors, timing belt, etc?
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I purchased a 2007 Sonata with the 3.3L about six months ago. I really like the car, it has a lot of good features and lots of power; however, I am starting to have problems with the car. On accelerating from a stopped position the car almost quits (hesitates severely) and then picks up and goes on normally. Also, between 40 and 50 mph the car starts to jerk pretty hard for a few seconds and then it straightens out and runs normally again; it will do this repeatedly if it is kept between 40 and 50 mph.
When this first started happening the CEL would come on randomly and stay on for a day or two and then go off. While the CEL was on I took it to Autozone and had them pull the code, they said it was the crankshaft position sensor. Well based on the symptoms the diagnosis made sense. I replaced the sensor and the car seemed to be running normally on the 30 minute test drive. The next day my wife drove to work and she said the same symptoms had come back. It has been several weeks since I replaced the sensor and the CEL has not come back on. I have seen several postings about the spark plugs and wires and that is my next step. BTW the car has 94k miles.
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