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 ?
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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2001-2017 Kia Optimas may experience transmission problems because of their outdated transmission control module (TCM).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.