What is the reason why the car shakes and the fault light will return to normal after a while?

1. Cold start:

Starting from the cold start, the main reason for the cold start body shaking is that the fuel combustion is insufficient, resulting in insufficient power of the car. The ignition energy is low, and when starting, especially when the temperature of the fuel and lubricating oil is low, more oil is required to meet the power.

The pole gap of the spark plug gradually increases, resulting in a decrease in ignition energy and poor fuel atomization, which causes the body to shake. In addition, the ignition energy can also be reduced due to the aging of the ignition coil, the aging of the high-voltage wire of the spark plug, or the leakage of electricity.

2. Shock absorption system:

Body shake is also related to the aging of the suspension system. It is mainly responsible for filtering out the shake of the engine when it is running, and if there is a problem with the suspension, these vibrations will be transmitted directly to the steering wheel and cab, affecting the driving.

When the engine is idling, it is easy to cause shaking when the electrical system in the car is turned on. The engine will increase the load when the electrical appliances are turned on, causing the idle speed to drop, and to compensate for the jitter caused by the idle slip, the engine will automatically increase the speed by partially.

3. Tire: For tires, the car must be balanced once when replacing new tires and new steel rims, otherwise the steering wheel will be prone to shake when the counterweight is uneven. If you find that the tire weight is not equal, you need to add lead to the inside of the rim to average the weight of the tires on both sides.

Whether it is a general steel ring or a lightweight aluminum ring, it may deform or crack when subjected to a certain external force. Deformation of the rim can cause shaking when driving, uneven weight of the rim can also cause shaking when driving, and incorrect angle of the rim can also cause shaking when driving.

4. Throttle:

The most common cause of car shake may be a dirty throttle valve and excessive carbon build-up in the fuel injector. After the car has been driving for a certain number of kilometers, the throttle valve will not close tightly or the idle motor will be stuck because the throttle valve is too dirty, resulting in high engine idling.

Therefore, when the body shakes, the first thing to do is to check the throttle and fuel injectors. If you find that the throttle valve is too dirty or the fuel injector has too much carbon deposit, you should clean it with fuel injector cleaner or throttle cleaner in time.

The vast majority of cylinder shortages are caused by faulty ignition system problems.

The key components of the engine ignition system are spark plugs and ignition coils.

The spark plug is a wearing part that needs to be replaced regularly, if the spark plug is not replaced for a long time, it will affect the electrode gap to become larger, which will affect the ignition energy of the spark plug.

The engine fault light of the car suddenly turned on, and the car also trembled, it must be that the engine is faulty, and the engine fault light will be on, it is recommended that you hurry to the 4S shop of the car to overhaul it to see what the problem is.

The reasons why the vehicle engine failure light is on: 1. The combustion state is not good; 2. Engine knocking; 3. The fuel quality is not good; 4. The inside of the engine cylinder is not clean and there is carbon deposit; 5. The computer cannot obtain the engine data. Engine failure light on solution:

1. Clean the engine, once the engine failure light is on, the owner should clean the engine in time; 2. Improve fuel quality, such as using good fuel additives to improve the cleanliness of fuel; 3. After the engine is cleaned with a higher grade of gasoline, in order to keep the engine in good working condition, the owner can choose to add 95 or 97 gasoline, which can usually solve the problem of the engine failure light on.

1. Poor gasoline quality and substandard: It is estimated that most car owners have this experience, and soon after the car is refueled, the engine fault light is lit on the car dashboard; This is generally due to the addition of poor quality gasoline at non-standard gas stations, resulting in insufficient combustion of the oil-gas mixture when the engine is working.

2. Oxygen sensor failure: Nowadays, there are two oxygen sensors installed on the car, one before and after the three-way catalytic converter. The function of the front oxygen sensor is to detect the air-fuel ratio of the engine under different working conditions, while the ECU computer adjusts the fuel injection amount and calculates the ignition time according to this signal.

The rear is mainly to detect the working quality of the three-way catalytic converter, so if the oxygen sensor is damaged or the sensor plug is damaged or loose, it will cause the mixture to be too thin or too thick, which will cause the fault light to be on.

3. Spark plug carbon deposition: The uneven quality of fuel on the market and the congested urban traffic make it easy for automobile spark plugs to produce carbon deposition, which will lead to poor engine work, such as difficult starting, unstable idling, poor acceleration, urgent refueling and tempering, exhaust gas exceeding the standard, and increased fuel consumption.

The engine fault light suddenly turned on, and the car also shook a little, which is likely to be an oil circuit failure or engine failure. You take a picture of the fault light icon, check it on the Internet, or call ** to ask the 4S store. If the fault is severe, it will be sent for repair.

1. The mixture of the engine burns poorly, but when the mixture in the cylinder is too thick, the vehicle will detonate and shake. When the mixture is too thin, the vehicle will have a weak acceleration.

2. If it is not a problem of the mixture, it is that the working condition of the spark plug, high-voltage wire and ignition coil is faulty, the ignition system is not working well, and the spark plug is not in good condition for flashing, which will also lead to the engine failure light and the lack of power for the car to shake.

3. Caused by abnormal oil supply pressure and failure of intake pressure sensor, if the oil pump supply pressure is abnormal or the intake pressure sensor value is wrong and the work is poor, it will cause body shaking and insufficient power.

When the engine fault light comes on and the vehicle starts to shake, you need to stop immediately, call a tow truck and wait for rescue. For the sake of safety, and for the safety of others, there is no need to risk continuing to drive.

Extended Information: Engine Maintenance Considerations:

1. Blindly remove the engine thermostat.

Due to the high temperature of the engine and blindly remove the thermostat, the coolant can only be circulated, can not adjust the cooling intensity, it is difficult to ensure that the engine works at a more suitable temperature, but the engine often works in a low temperature state, resulting in a decrease in engine power, accelerated wear and increased fuel consumption.

2. The engine temperature is not afraid of high or low.

Some people think that the engine temperature is not afraid of high or low when driving. In fact, when the engine temperature is low, it is also very harmful. The service life of the engine should be ensured by driving at the normal temperature specified in the car's instruction manual.

In the process of using the car, we often encounter engine failure lights that suddenly turn on, which may be accompanied by shaking, and restart normally after turning off, usually a yellow fault light. This situation is likely to occur shortly after filling up gasoline, or in the cold of winter, when the fault light is turned off for a while.

This can be caused by poor combustion, engine combustion misfire. This kind of fault light does not affect the driving of the car and does not reduce the power of the car, so it is not caused by mechanical failure, it can be simply understood, it is not an engine failure, and there is no need to worry too much.

After the last two annual inspections of the car, the ABS symbol is lit up after the self-inspection of the power, and after the ignition of the vehicle shakes a little, the ABS is extinguished, and the vehicle is normal, and there is no problem in driving. Personally, I think that the occasional fault display is not a big problem, and the repeated occurrence must remember to check the ** symbol and go to the repair shop as soon as possible to check and eliminate.

Hello, the engine failure light is on, the car is shaking, you should ask for help from a 4S shop or a professional auto repair shop, call a tow truck or wait for rescue, don't risk continuing to drive.

Occasional failures, you can ignore it, continue to open, if you don't worry, then go to the maintenance of the factory with a computer to read the fault code at that time, you will know what the situation is.

The car's engine fault light is on, and the car is shaking, so it's best to go to the repair shop to check it and see if you can read the fault code.

It shows that the engine of the car has the phenomenon of instantaneous stalling, which is a big hidden danger, and should be sent to the repair shop immediately for an inspection to avoid future troubles.

Generally, there will be no problem, if the symptom occurs again or more than three times, it is recommended to enter the factory for maintenance and inspection.

Causes of unstable car idling;

Throttle oil and throttle carbon deposits, dirty intakes, blocked intakes can cause idle pulling, throttle carbon deposits or oil are the most common causes of unstable idling.

Spark Plug Failure: Weak sparks caused by individual spark plug failures can also cause carbon deposits, which can be cleaned to restore spark plug activity, but some spark plugs have a fast lifespan and can reduce performance.

Blocked oil circuits: There are also oil circuit blockages and intake pipe failures represented by fuel injectors. When the oil circuit represented by the injector is blocked, the fuel supply pressure is insufficient, the fuel atomization is poor, the mixing ratio is unbalanced, and the combustion is incomplete, which leads to related failures.

Specific solutions to idle jitter:

1. The engine has serious carbon deposits. The most common cause of idle judder is excessive carbon build-up on the throttle or injector. When there is too much carbon deposit inside the engine, the gasoline sprayed by the fuel injector during cold start will be absorbed by the carbon deposit, resulting in a mixture that is too thin and making it difficult to start.

After landing, the gasoline adsorbed on the carbon deposits will be sucked into the cylinder by the engine and burned, which will thicken the mixture. The mixture is sometimes dilute and sometimes thick, which will cause idle jitter after cold start. The lower the temperature, the greater the amount of oil required for cold starts, and the more the presence of carbon deposits affects cold starts.

The solution is to clean the carbon deposits at the throttle and injector.

2. Poor ignition system and poor ignition of spark plugs will also lead to engine idling and shaking. If there is a problem, check if the ignition system is faulty and if there is too much carbon deposited in the spark plug.

3. The oil pressure is unstable. If you have cleaned the engine carbon deposits, cleaned the throttle valve or replaced the spark plug, and there is still the problem of body shaking when idling, it is recommended to go to the 4S shop to check whether the fuel supply pressure and intake pressure sensor are normal. If the oil pump supply pressure is not normal or the intake pressure sensor is incorrect, it can also cause the body to shake when idling.

Solution; The best way is to clean the oil circuit, clean it regularly, there is no specific experience in the research and development parameters of the clean engine from the new car, coupled with the continuous improvement of emission standards, can not adapt to the change of fuel, all manufacturers of the engine are unable to solve this jitter problem in the short term, plus the fuel quality is not very good or the initial fuel of the new car factory is stored for too long, resulting in a rapid increase in the colloidal composition of the oil circuit, which will continue to pollute the fresh fuel and cause no good fuel to participate in combustion in the later stage. The occurrence of excessive carbon deposits is especially common for China VI vehicles. We can only gradually alleviate most of the problems by maintaining clean oil circuits. The use of PNF dope fuel additives can solve the problems caused by carbon deposition.

1.When a vehicle shakes out, the throttle and fuel injector should be checked first. If you find that the throttle valve is too dirty or the fuel injector has too much carbon deposit, it should be cleaned in time.

2. The engine foot is aging, the car shake is sometimes related to the aging of the engine foot, the engine foot is actually the shock absorption system of the engine, the engine foot is responsible for absorbing the subtle shake of the engine when it is running, if there is a problem with the engine foot, these vibrations will be transmitted to the steering wheel and the cab, resulting in the engine at idle speed, and the vehicle shake is most likely to cause when the automotive electrical system is turned on. The engine will increase the load due to the opening of the electrical system, causing the idle speed to slip, in order to compensate for the jitter caused by the idle slide, the engine will automatically pull up the speed a little. Therefore, when the car's electrical system is turned on, especially when the car air conditioner is started in the summer, the engine often shakes.

If the jitter at idle does not decrease due to the operation of the on-board air conditioning compressor, this jitter is likely to be caused by the aging of the engine feet, and it is necessary to replace the engine feet with new ones in time. Uneven tire weighting is also a cause of judder.

3. The aging and deformation of tires and the shaking of the chartered car during the journey are far more worrying to the driver than the shaking during idling. Most of the shake of the vehicle while moving is related to the drivetrain, and one of the most basic links is a problem with the tires. I hope the above will help you, hopefully!

The engine fault light is a problem that most car owners will encounter, like a faucet-like yellow light, the car circuit, various sensors and control modules are faulty, which will cause the engine fault light to be on. To be precise, the engine fault lamp belongs to the emission system lamp, and when the engine computer detects that a sensor is broken, which may cause the emission to not meet the standard, the fault lamp will be lit.

In addition to a very small number of sensors with a separate fault light, almost all electronic components on the car will light up the engine fault light, so the owner is still relatively easy to see this light. So is it a big problem after it lights up? Can the car still be driven?

As long as the fault light is on, it means that there is a problem with a certain part of the car, but if the car can still move, it means that it is not a particularly big problem, because if there is a particularly serious failure, a red light will be on, and the engine fault light is yellow. After it is lit, we try not to drive long distances, and drive to the nearest maintenance station as soon as possible for inspection and maintenance, so as not to let temporary small faults develop into big problems.

After the fault light is on, there are two situations: one is that although the light is on, there is no abnormal feeling when driving, and everything is normal such as acceleration and braking, then the car can be driven normally. It may be that a sensor has failed once, and now it is fine, or some external conditions interfere, or this fault does not affect the vehicle at all, but may have a certain impact on emissions.

In this case, you can continue to drive for the time being, and take the time to go to the repair shop for inspection.

The second is that the fault light is on, but the car does have abnormalities, such as serious shaking and weak acceleration. In this case, it is best not to continue driving and ask for a rescue trailer. If it's close to the repair shop, you can barely drive there.

Because there is an obvious fault phenomenon, it means that there is a more serious fault, and continuing to drive will increase the fault, or the harm caused by this fault will gradually accumulate and develop another fault, so it is not recommended to continue driving.