my 2011 kia Optima jumps when I put it on gear, either reverse or drive. after about a half-hour of driving if I come to a stop it.
My 2011 kia Optima hybrid jumps when I put it on gear, either reverse or drive. After about a half-hour of driving if I come to a stop it rattles like it wants to turn off.
My car has 120000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
Hi there. There seems to be something wrong with the Hybrid transmission on your vehicle. The transmission may have an internal part that is malfunctioning. I recommend seeking out a professional, such as one from Your Mechanic, to help you with your Hybrid transmission.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
An indication that a vehicle is not receiving the right mixture of air and fuel is if the vehicle jerks or surges forward at high speed. Several components of the fuel or air intake system could cause this jerking or surging sensation to happen.
Any unusual shaking or vibrating forces coming from the engine is cause for concern. It could be something as simple as old spark plugs producing an uneven power delivery, it could be something serious like worn or broken engine mounts, or it could be even more serious in the case of internal engine damage.
Kia Motor Company (Kia) is recalling certain 2011-2014 Optima, 2012-2014 Sorento and 2011-2013 Sportage vehicles. Machining errors during the engine manufacturing process may cause premature bearing wear within the engine. Bearing wear may result in the engine seizing, increasing the risk of a crash.
2001-2017 Kia Optimas may experience transmission problems because of their outdated transmission control module (TCM). Affected vehicles may exhibit jerking and lurching when downshifting. They may start acting up at around 67,000 miles, which may trigger your check engine light.
Typically when you hear a grinding noise when you move forward or in reverse it`s usually an indication of a gear fault either in the transmission or another driveline component. If this occurs only when in reverse, it`s likely a damaged reverse gear.
The most likely reason that a car jerks when accelerating from stop is a problem with the clutch. It could be due to worn-out friction material or a pressure plate defect (or combination of both). It could also be caused by an oil leak contaminating the clutch plate.
The most prevalent cause of vibration is problems with your wheels or tires. The potential problems include improper wheel and tire balance, uneven tire wear, separated tire tread, out of round tires, damaged wheels and even loose lug nuts.
Worn or dirty spark plugs can cause a petrol car`s engine to misfire in one or more cylinders, which can cause vibrations when the car is idling or at running speeds. The easiest solution is to replace your spark plugs and check the related wiring. Engine vibrations can also be due to the air and fuel systems.
An engine that is hesitating to accelerate is most likely dealing with a fuel/air mixture that is too lean. Engine`s that are running inefficiently will begin to show signs like hesitation which will only become worse over time.
2011 Kia Optima Overview
Reviewers liked the 2011 Optima`s overall performance, saying that they were happy with the base engine`s power. The Optima also has outstanding safety scores and gets up to 24/35 mpg city/highway, which is good for the class.
When your vehicle is unable to shift out of neutral or park, this is a clear indication that there is a serious problem somewhere in the transition system. A failing transmission position sensor may no longer send the right signals to the Powertrain Control Module, or PCM.
Transmission Range Sensor (TR)/ Transmission Position Sensor
The PCM uses this information to control which gears of the transmission to enable or disable. When the TR sensor fails it can cause wrong gear starts, no upshifts, or what feels like a falling-out-of-gear condition.
Clogged Fuel Injectors
A clogged fuel injector can prevent the fuel your car needs to accelerate, thus causing you car to jerk in the process. If you hear your car engine stuttering, then the injectors may not be providing an adequate amount of fuel. To fix this, you should clean the injectors on a regular basis.
Many different faults can cause the vehicle to jerk and have acceleration issue. The most likely cause of these are spark plugs, battery, alternator, fuel pump, low transmission fluid, MAF sensor, vacuum leak, exhaust leak or oxygen sensor. All of these would need to be ruled out before the transmission was replaced.
Typically, a surging or jerking motion can be caused by an unbalance of air and fuel in the engine. Your engine needs the exact amount of an air and fuel mixture to properly perform the combustion process.
The most common reasons a Kia Optima shakes when braking are bad brake rotors, bad brake pads, or a bad wheel bearing.
Improperly functioning spark plugs cause an uneven burn of fuel in the engine, resulting in fluctuating RPMs and a louder noise. You might also experience increased vibrations of your vehicle while sitting idle or while traveling at low speeds. These vibrations originate from the engine and can shake the entire car.
Low automatic transmission fluid can cause shaking. If the shaking is accompanied by the check engine light, it`s time to visit a mechanic. Drivers of manual cars might discover their clutch master cylinder is the source of the shaking.
The most common reason for a car to shake is related to tires. If the tires are out of balance then the steering wheel can shake. This shaking starts at around 50-55 miles per hour (mph). It gets worse around 60 mph but starts to get better at high speeds.
To help confirm that the vehicle has an engine speed related vibration, with the vehicle stopped, put it into park or neutral and raise the engine speed to the RPM at which the vibration occurred to see if the vibration can be reproduced. If reproduced, diagnosis should begin with engine speed related components.
Clogged Air Filter
When moving from a stop, stuttering can happen for several reasons, but a dirty air filter is one of the most common. For a car to run, it needs a steady flow of air, which a dirty or clogged air filter can hurt.
About Knock Sensor
A sensor that detects the knocking vibration of the engine with piezoelectric ceramics, used in spark advance control, will contribute to the improvement and fuel economy of the engine performance.
Allegedly, issues like carbon buildup, oil sludge deposits, and wear of engine parts eventually lead to a costly rebuild or engine replacement.
The materials used are lower in quality than other manufacturers, but Kia is quite smart when it comes to production. Some of the cheaper plastics are used sparingly, so many of Kia`s interiors look and feel fancy – but they still managed to save on production costs and pass the savings to the customers.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
my 2011 kia Optima jumps when I put it on gear, either reverse or drive. after about a half-hour of driving if I come to a stop it.
ANSWER : Hi there. There seems to be something wrong with the Hybrid transmission on your vehicle. The transmission may have an internal part that is malfunctioning. I recommend seeking out a professional, such as one from Your Mechanic, to help you with your Hybrid transmission.
While driving, car jumps into lower gears unexpectedly almost coming to a stop. Then the car jumps back into higher gear at random intervals.
ANSWER : Hi there. Sounds like the kick down solenoid is sticking and not functioning correctly. The kick down solenoid make the circuit within the transmission valve body (transmission controller) to down shift when under heavy acceleration to allow a lower gear to be engaged. What is happening is the solenoid is operating without the throttle demand. I recommend replacing the kick down solenoid and checking the throttle position sensor (TPS) for its working properly. If you need further assistance with your transmission going into lower gears unexpectedly, then seek out a professional, such as one from Your Mechanic, to help you.
Shifting issues from drive to reverse and back to drive
ANSWER : Mercedes has a dealer service order (#Order No: S-B-27.19/118A
) that addresses diagnosis, and possible dealer repair of the transmission for your model. Check with your dealer to confirm coverage of this.
) that addresses diagnosis, and possible dealer repair of the transmission for your model. Check with your dealer to confirm coverage of this.
Transmission was low. Put 4 quarts in it and everything was fine until next morning shifting to drive and felt like neutral
ANSWER : If the fluid was 4-5 quarts low, that’s a third of the total transmission fluid capacity. The transmission has probably been running very hot because of that, causing accelerated wear to the internals (clutches, etc). Check the dipstick for the correct fluid type to use. Ford transmissions are very fussy about using the correct fluid type. You can try a full transmission fluid service by replacing the fluid and filter, not a "trans flush". You might get lucky and have that solve your problem, but odds are with being driven with the fluid that low, a transmission rebuild may be the only solution.
when I put my car in drive it won’t go but when I put it in low gear and up the RPM its will slowly take off then I have to shift
ANSWER : Hello. The transmission malfunctions you are experiencing can be caused by a wide variety of issues. A few common causes for improper shifting behavior are low or contaminated transmission fluid, transmission sensor issues, or a worn transmission. The first thing I would do is check the vehicle’s transmission fluid to make sure that it is clean and at the correct level. Automatic transmissions operate using fluid pressure and can experience all sorts of issues, including problems shifting, if the fluid is low or dirty. It may also be possible that one or more the transmission components has gone bad and needs to be replaced. Automatic transmission use a series of solenoids and sensors to control the transmission shifting point, and can cause symptoms similar to those you are experiencing if they go bad. Another possibility is that the transmission itself has worn out due to age and service, and may need to be serviced or even rebuilt. As these sorts of issues can sometimes be difficult to diagnose, I would recommend having a professional technician, such as one from YourMechanic, come to your location to determine what the exact cause of your shifting and transmission problems.
My truck won’t allow me to change gears even when pressing the clutch. No gears go in at all. Makes it impossible to drive.
ANSWER : Hello, this concern is possibly the slave or clutch master cylinder failure. These two components use brake fluid to apply pressure for movement of the clutch system. This fluid breaks down in time and causes the seals to fail (leak). A low fluid level would cause this concern as well as internal leakage. Replacement of components would be necessary. This type of concern would need to be inspected. If you’d like, a certified technician from YourMechanic can come to your location to diagnose your vehicle, and possibly replace your clutch master cylinder if need be.
My car will only shift into reverse and neutral, can’t get it into the drive gear
ANSWER : This may be a result of low transmission fluid or potentially a faulty transmission control module. A faulty transmission control module may cause a delay in acceleration or erratic shifting of gears. The transmission control module has various sensors such as vehicle speed sensors, wheel speed sensors, throttle position sensors, turbine speed sensor, and transmission fluid temperature sensors that all direct information to it in order for it to perform it’s function. Other functions controlled by the TCM are components such as a kick down switch, traction control system, and cruise control module. Any of these may also affect the way the transmission control module performs and controls the transmission and the shifting of your vehicle. I would suggest having a professional from Your Mechanic come to your location to properly diagnose your transmission problem.
Car only drives in first and reverse
ANSWER : What you are describing may be a result of a faulty speed sensor, potentially low transmission fluid or a even a faulty transmission control solenoid. As your vehicle travels down the road, the computer analyzes data being sent by vehicle speed sensors and engine speed sensors. Based on this information, the Engine Control Unit (ECU), or the Transmission Control Unit (TCM), executes the appropriate upshifts and downshifts by sending a signal to one of several shift solenoids. These transmission solenoids have spring-loaded plungers inside them, which are wrapped with wire. When this coil of wire receives an electrical charge from the TCM / ECU, it causes these plungers to open, allowing transmission fluid to flow into the valve body and pressurize the desired clutches and bands. When this happens, the transmission changes gears and you continue down the road. The computer controls the transmission solenoid in several ways. If the vehicle is equipped with a dedicated Transmission Control Unit, it can open or close the hydraulic circuit using a direct 12v signal. In some cases, the Engine Control Unit (ECU) can control the solenoid’s plunger by turning the ground circuit on and off. When this is not working properly, this can cause a jerking reaction, a delay in shifting or in some cases may cause the transmission to hesitate in shifting gears. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your transmission.
