The check engine light came on. The Check indicator is on: we are looking for the reasons and eliminating the problem that has arisen Hyundai Solaris the check engine light is on causes

The check engine light came on - reasons

main reason If the indicator lights up, the engine error is when serious problems are detected by the control unit in the engine. In this case, movement is possible if the check engine light comes on and the indicator does not blink, the behavior of the car itself remains unchanged, just as the engine power and its response to pressing the gas pedal remain unchanged, and also if other error indicators indicating the presence of some or problems, they are “silent”. It is also worth paying close attention to the coolant and oil levels; their number should not change dramatically. But even in this case, it is worth getting to a car service center as quickly as possible.

Driving when the indicator lights up - engine error is prohibited in several cases:

• The car changed its behavior on the road;
• The engine power has decreased, you feel its vibrations;
• You smelled something burnt;
• The engine service light is on intermittent mode(flashing);
• The emergency oil level indicator came on;
• The engine overheating warning light came on.

An engine error can cause serious damage. And, worst of all, the car dealer may refuse to perform free warranty repairs.

Check Engine Light is on - what to do?

If the emergency oil level indicator lights up while driving, you should immediately turn off the engine. After this, you need to check the oil level, and if it is lower permissible value, you should add oil and try to start the car again. If adding oil does not change the situation (the check engine light is still on), in this case you should contact a car service center. The main thing to remember is that you should never try to get to a car service center in your car if you do not want your engine to suffer serious damage when running without lubrication.

The onset of overheating can be signaled by an indicator responsible for warning the driver about high temperature fluid in the expansion tank, and the shift of the pointer reflecting the fluid temperature towards higher values. If the pointer has not reached the red zone, which means that expansion tank still has a sufficient supply of fluid, and no signs of “dangerous overheating” have appeared, reduce temperature regime you can do it yourself by following a few simple steps:

• Reduce vehicle speed;
• Do not use air conditioner;
• Turn on the heater to reduce the engine temperature. If, after turning on the stove, the flow of hot air does not begin, stop immediately. These are the first signs of “dangerous overheating”.

In addition to the above-described methods for identifying “dangerous overheating,” there are a number of others: the presence of steam emanating from under the hood of the car, a decrease in engine power level, an empty expansion tank, failure heating system when outside (cold) air begins to enter the cabin.

It often happens that on the instrument panel in the interior of a car equipped with electronically controlled, the emergency sensor light comes on. If the car starts up and continues to work, but the check engine light comes on, this means that the inclusion occurred in emergency mode. Some models modern cars(Audi, BMW, Mercedes-Benz, Porshe, VW) are equipped with a system capable of self-diagnosis; errors in decrypted form are sent to the information panel. But drivers are not always able to understand why the check engine light came on.

To start the engine, the driver turns on the ignition. If the check engine light is flashing at the same time, this should not cause concern, since it will soon go out. But a burning signal while the engine is running indicates problems with its operation.

If a malfunction occurs in the operation of the power unit, an error is recorded in the memory of the control unit in the form of a coded signal. In this case, the check engine light appears on the dashboard. If the car does not have diagnostics in automatic mode, you need to connect a scanning device to a special connector. The scanner reads the code and provides a detailed explanation of the error.

In the process of electronics development, Check indicator The Engine has evolved from a simple fault sensor to a multi-functional indicator. When a modern check engine light flashes, it reports the following inconsistencies:

• incorrect composition of fuel mixtures;
• settings failures in the ignition system;
• sensor failures.

It is also his responsibility to report non-related issues. power unit. To identify the location and nature of the breakdown, the technician will need professional knowledge, experience, special devices and tools.

Important: The electronic unit The ECU commands the indicator to flash as a result of detecting errors of varying degrees of complexity. Among them there are problems both serious and minor. For diagnostic purposes, it is recommended to suspend operation vehicle. Experienced car owners often independently determine the reason for the inclusion of a check, without waiting for a visit to the service station.

Signs of main malfunctions and reasons for the appearance of the indicator signal

If the light comes on while the car is moving Check Engine after refueling at gas station, most probable cause- inappropriate quality of the filled gasoline. The following symptoms are observed:

1. Reduced power.
2. Interruptions in engine operation (stalls).
3. Detonation as a result of incomplete combustion of fuel.

• add a portion of higher quality fuel to the tank;
• Drain the recently filled gasoline and clean the fuel system.

If the check does not want to go out after the cause has been eliminated, you need to delete the error recorded in the device’s memory using a special computer program.

Checking the oil level and condition

The next most important reasons for the occurrence of a signal are considered to be overheating of the motor, a decrease in the level lubricating fluid in the internal combustion engine. It is recommended to check the engine temperature. If there is no overheating, you need to check the volume and condition of the oil. After checking the level, you need to add the missing amount lubricant. Using a clean paper napkin, the quality and composition are checked motor oil according to the following criteria:

1. Color.
2. Consistency.
3. Presence of mechanical inclusions.
4. The smell of burning.

If everything is in order with the quality and quantity of oil, the engine starts to eliminate unusual sounds, noise when operating in the same mode idle move, and under load.

If unusual noise effects of a running engine are detected against the background of a burning check, it is recommended to send the car to the nearest service company. Moving the car yourself is not recommended; delivery is carried out by towing or other convenient method. Further operation can lead to serious damage and costly repairs to the elements of the power unit.

Flashing indicator and engine tripping

When the check engine light flashes and the engine starts at the same time, it is necessary to inspect the elements of the ignition system:

• wiring;
• coil.

The tripling effect occurs when only three combustion chambers are firing instead of all four. The engine begins to stall when there is no injection of the air-fuel mixture into one cylinder.

Worn out and dirty spark plugs can also cause the Check Engine light to turn on. In order not to think for a long time about how to remove the check engine light, you just need to clean or completely replace the outdated spark plugs with a new set.

Testing the ignition coil comes down to measuring the resistance at the terminals and testing for the ability to create a blue spark.

What to do if the check engine light comes on due to a malfunction in the fuel supply system

In case of problems associated with the flow of fuel into the cylinders, it is recommended to check the condition of the spray nozzles. Their holes must be cleaned, washed, and, if necessary, completely replaced with new devices.

A decrease in pressure in the fuel system is caused by malfunctions:

1. Gasoline pump (in carburetor, injection engines).
2. Fuel filter
3. Injection pump pump (in diesel).

If the check light is caused by a failed catalytic converter, drivers simply remove it from the exhaust system and then disconnect the corresponding sensor (oxygen).

How to reset check engine error

If critical errors occur in engine operation, the information is recorded in the ECU memory and is not deleted independently even after the defect is eliminated. At the same time, the check remains illuminated. To reset a recorded error with your own hands, experienced car owners perform the following operations:

• warm up the engine to operating temperatures;
• disconnect the terminal at battery for some time (from 5 to 15 minutes);
• restore the connection with the terminal;
• insert and turn the ignition key before starting (all the indicators on the devices are lit);
• wait one minute;
• turn the key in the opposite direction.

Most often, such actions lead to the desired result; the error code disappears from the memory of the ECU. The check stops lighting after the engine is turned on and idled for three minutes.

If the method of disconnecting the terminal does not work, the indicator continues to blink, the error is removed from the memory of the control device using special computer programs through the OBD pinout diagnostic connector.

The control unit can also cause the check signal to turn on if individual elements of the computer partially or completely fail.

Automobile: Hyundai Solaris. Asks

: Smirnov Kirill. Essence of the question: How to reset a “CHECK”?

Hello! I have a Hyundai Solaris, and the “check” light constantly lights up! I already went to the station Maintenance and found out what the problem was. The first time they dropped it on me, and now it appears again, and the behavior of the car has not changed at all. Please tell me how I can reset it myself, because I don’t want to pay for it again in the service.

The vehicle owner may need to diagnose and remove errors that occur on the Hyundai Solaris in various situations when there is no desire to do this work in a certified service center.

It’s not difficult to do this job, the main thing is to know that you can remove it yourself errors related to the first level , that is, those that are not recorded in the ECU memory and do not significantly affect the operation of the car and its devices. Because only a special dealer device (scanner - approx.) can remove such errors, one of these errors includes the error of the car's airbags.

When do you delete errors yourself?

Among all the important problems with the Hyundai Solaris, some can reset themselves after one or another repair.

For example, error codes with 301 By 304 , indicating a missing spark in one of the cylinders (the last digit of the error refers specifically to the cylinder - approx.).

Accordingly, when these gaps are detected, the ECU will give a signal in the form of a burning “CHECK”, which cannot be removed either by erasing the code or by resetting the terminal from the battery.

This error can be completely removed only by replacing the non-working spark plug with a new one, after which the error will disappear by itself.

Self-resetting a check for a Hyundai Solaris

It is possible to reset errors yourself on the Hyundai Solaris thanks to OBD-II protocol and the presence of a special adapter with a diagnostic device, be it a smartphone or a computer that supports Bluetooth wireless technology.

In order to check for errors on a car, perform the following steps:

The process of diagnosing and resetting errors without OBD-II

On the Hyundai Solaris, you can diagnose and remove errors, even without having any additional devices at hand.

Diagnostics (this method does not work)

The method described below is circulating all over the Internet. We checked on our editorial machine. He does not work. We do not remove the method, as some owners may think that it works.

Refutation on video:

Removing errors

• In order to remove the error, you need to do the entire above work from steps 1 to 5, and without turning off the ignition, press the gas again.
• After that, turn the ignition off and on and start the engine.
• If the work was done correctly, the error should be removed.

As you can see for yourself, there is nothing difficult in removing errors on the Hyundai Solaris yourself.

In the video the check light is on and the Hyundai Solaris stalls

Many of us have encountered such a problem as turning on the engine icon ( Check engine...), the appearance of which frightens car drivers. We offer you the 5 most common reasons why dashboard The check engine light comes on.

The engine warning light usually appears without warning. The reason for the appearance of the Check engine cannot be immediately understood. Even if the car has auto diagnostics (for example, in cars such as ,), which scans all car systems for errors and, if any, displays a decryption on the information panel, the reasons for the appearance of the check engine light will not be decrypted.

For most drivers, the appearance of this warning icon on the dashboard means the need to urgently go to an auto repair shop to diagnose and eliminate the reason why the "Check Engine" warning sign appeared. But in fact, in most cases, when the “Check” indication appears, it is possible, and in some cases, perhaps, to eliminate the cause yourself without a trip to a car service center, which will save you money.

1. Replace the oxygen sensor (lambda probe)

The oxygen sensor in your car is part of the exhaust system exhaust gases, which controls how much oxygen is not burned in the engine combustion chamber. This sensor helps control the vehicle's fuel consumption. Malfunction oxygen sensor(lambda probe) means that the car computer is receiving incorrect data, which can significantly increase fuel consumption and reduce engine power. Most cars have 2 to 4 oxygen sensors. If you have a home car error scanner, then by connecting it to the car, you can easily find out which sensor needs to be replaced.

For what reason does the oxygen sensor in a car become unusable? Over time, the sensor becomes covered with a layer of used engine oil (oil soot), which reduces the accuracy of reading sensor readings for regulating the gasoline mixture and distributing the optimum. A malfunction of the oxygen sensor in a car leads not only to, but also to increased levels of harmful substances CO2 in the exhaust.

What to do: If you do not replace a faulty car oxygen sensor, this can lead to your car's catalyst failing (it may burst), which will result in expensive repairs. The cost of new catalysts is very high due to the precious alloys they contain. On some cars, there are several catalysts, the cost of which can reach up to 90,000 rubles. So don't delay replacing the sensor. Although replacing the sensor and its cost is not very small, it is not commensurate with the cost of the exhaust gas catalyst system. You can also save on replacement costs by doing it yourself. Many car manuals contain detailed instructions, how you can replace the oxygen sensor yourself. If you know where the oxygen sensor is located, then it will not be difficult for you to disconnect the faulty lambda probe and replace it with a new one. Remember to wait to replace this important element You can't pull!

2. Check the fuel filler cap

Many drivers, in most cases, when the “check engine” indication appears, will think about serious problems in the car engine, but will not even think about checking for leaks fuel system which may be broken due to a defect or insufficiently tightened neck cap fuel tank. This is a very common reason for the appearance of the "Check" engine icon.

Reason for the error: Leakage of the fuel system due to the passage of air through the fuel tank filler cap will increase the vehicle's fuel consumption, to which the vehicle's diagnostic system will generate an engine error by turning on the "Check engine" indication on the vehicle's instrument panel.

What to do: If, when the “Check” indication appears, your car has not lost power, and there are no audible signs of engine damage (engine knocking, humming, creaking, etc.), then first check the gas tank for leaks. Your gas cap may be cracked or not tightened enough. If the cap was not tightened enough, then after tightening it all the way, continue driving the car for a while to see if the engine error disappears. To prevent a check engine light from appearing for this reason, check your fuel filler cap regularly. Remember that the cover must be replaced with a new one periodically!

3. Car exhaust catalyst

An automobile catalyst helps a car make engine exhaust gases more environmentally friendly. It converts carbon monoxide and other harmful substances into harmless compounds. If your exhaust catalyst has become unusable, you will notice it not only when the engine icon (check) appears, but also long before that, when the car’s power drops by half. For example, when you press the gas pedal, the car will not have good acceleration dynamics as before.

What can cause a car catalyst to fail: If you regularly service your car in accordance with the car company's maintenance regulations, then the catalyst should not fail. The main reason for catalyst failure is untimely replacement of a faulty oxygen sensor, as well as non-regular replacement of spark plugs when their expiration date expires. When the oxygen sensor or spark plugs are faulty, the conversion of carbon monoxide in the catalyst into harmless chemical elements stops, which leads to overheating of the catalyst, which can therefore fail.

What to do: If your catalyst has become unusable, then you cannot drive a car, since the engine will not work correctly, warning about this by an indication on the dashboard with an engine icon (check). Also, your fuel consumption will be greatly increased, and there will be no engine thrust. Although replacing a catalyst is a very expensive repair, there is no escape from repairs. Although there is an alternative to replacing the catalyst with a flame arrester, this is not a 100 percent option. Unfortunately, if you are not an experienced auto mechanic, you will not be able to replace a faulty exhaust gas catalyst yourself. In any case, you will have to contact a car repair shop. Remember that timely replacement of oxygen sensors and spark plugs protects your catalyst from damage!

4. Replace the mass air flow sensor

The mass air flow sensor regulates how much air needs to be added to the gasoline mixture for optimal ignition of the fuel. The sensor constantly reports data to the car's computer about the amount of oxygen supplied. A faulty mass air flow sensor increases fuel consumption, increases CO2 levels in the exhaust gas, and reduces engine power and smoothness. Also, if the sensor is faulty, poor acceleration dynamics are observed. In cold weather, a car with a faulty sensor has difficulty starting.

What are the reasons for the failure of the mass air flow sensor: Most sensor failures occur due to incorrect installation air filter when it is scheduled to be replaced. Also if not changed regularly air filter, as required by the vehicle maintenance regulations recommended by the manufacturer, the mass air flow sensor may fail.

What to do: Theoretically you can for a long time Drive with a broken mass air flow sensor (several weeks or months). But you will notice that the longer you drive, the more your fuel consumption increases. Replacing the sensor in a car service is not that expensive, since the work itself does not take much time and is quite simple. The main costs are related to the cost of the sensor, which for some car models can be 11,000-14,000 rubles if it is an original sensor or up to 6,000 rubles if it is an analogue substitute. Self-replacement sensor is very simple. But due to the low cost of replacing the sensor, you can entrust this work to a mechanic at a car service center. Remember that you need to regularly change the air filter, observing the vehicle maintenance regulations!

5. Replacement of spark plugs and high-voltage wires

Spark plugs in a car are the main ignition parts fuel mixture. If the spark plugs are faulty, the spark will not be supplied correctly to ignite the gasoline mixture. Faulty spark plugs often result in a lack of spark or an incorrect spark interval, which results in the engine not running properly. If the spark plugs do not work properly during acceleration, especially from a standstill, you may feel slight jolts.

What are the reasons for spark plug failure: Most spark plugs in vehicles built before 1996 need to be replaced every 25,000-30,000 kilometers. In newer cars, spark plugs last more than 150,000 km. However, these scheduled spark plug replacement intervals may be reduced by various factors related to fuel quality and driving style.

What to do: If your spark plugs have not been changed for a long time, or you feel failures in the engine operation associated with ignition, then you must immediately replace them with new ones without delay. Don't try to save on untimely replacement spark plugs, since the cost of spark plugs is not very expensive, as well as the work of replacing them. By replacing old spark plugs, you will improve engine performance and reduce your vehicle's fuel consumption. Changing spark plugs yourself is quite easy. Basically, they are easily accessible under the hood of the car. You need a regular spark plug wrench to remove the spark plugs from the engine. It is also advisable to monitor the condition high voltage wires, since over time they can become unusable and allow electricity to pass through to the spark plugs, which will reduce the strength of the spark. Remember that regularly replacing spark plugs, in accordance with your car’s maintenance schedule, protects your exhaust catalyst from breakdowns and also improves engine performance!

If the Check engine indicator light comes on on the dashboard of your car (or simply the “check” is on), you should at least be wary. The reasons for this can be very diverse - from a loose gas tank cap to serious problems with engine.

What does the Check Engine Light mean?

The name of the Check engine indicator literally translates as “Check engine”. However, when the light comes on or blinks, the engine may have absolutely nothing to do with it. A lit indicator may indicate problems in the fuel supply system, failure of individual ignition elements, etc.

Sometimes it can be a very minor problem - for example, a loose gas tank cap or a faulty catalytic converter. However, you should not ignore the indicator signals under any circumstances, as this can result in serious problems.

Sometimes the cause of the indicator light may be poor fuel quality. So don’t be surprised if, after refueling at an unfamiliar gas station, you see the Check Engine light flashing.

Typically the indicator is located on the car's dashboard under the engine speed indicator. It is indicated by a schematic engine or a rectangle with the inscription Check engine or simply Check. In some cases, instead of an inscription, a lightning symbol is depicted.

Is it possible to continue driving while the light is on?

Worn out brake pads, it’s time for the next maintenance, the speed is switched incorrectly, low-quality fuel is used, the on-board voltage has dropped - all this can cause the Check indicator to light up. First of all, you should check the motor. If the reason for the signal to turn on is due to engine malfunctions, it is dangerous to continue driving.

The problem is aggravated by the fact that it is impossible to independently determine the malfunction of a modern internal combustion engine by smell or color. You should contact professionals who will use a scanner to identify the malfunction, if, of course, there is one.

A burning Check light may indicate various breakdowns - it is better not to ignore it

Therefore, if after restarting the car the light does not go out, you can only drive it to the nearest car service center. There they will conduct a comprehensive diagnostic of the engine and its systems.

Operating a vehicle with the Check engine icon illuminated leads to increased consumption fuel, unstable engine operation, decreased traction characteristics car. Moreover, in this case, the car owner may lose the guarantee for car repairs.

Why did the light come on and how to fix it

The main situations in which the indicator lights up and the recommended courses of action for the car owner:

1. If the Check engine lights up and goes out immediately when starting the car, there is no damage to the engine. The cause of the fire is most likely harmless - the loss of the fuel tank cap or its looseness. Just wrap it tightly and check if the warning disappears.
2. If the indicator lights up while driving, you should stop and check the wires. You may find a cable hanging loose under the hood or an open battery terminal. This applies to everything attachments- wires, hoses, etc.
3. If the light flashes while driving, you should stop and check the sounds made by the engine, pay attention to the oil level, and inspect the sides of the engine. If no visually obvious violations are detected, it is recommended to drive to the nearest car service center and carry out diagnostics.
4. If the engine is running normally and the Check light is constantly flashing, there is most likely an ignition failure. You should check the spark plugs and coil, pay attention to the quality of the fuel. To do this, it is better to contact the nearest auto diagnostic center.
5. If the indicator is constantly on, you need to stop, unscrew the spark plugs and check the gap. Gaps that exceed 1.3 may cause the light bulb to burn out.
6. In addition, when the “check” is on, the ignition is usually checked. Any car service center has special testers that allow you to determine the wear of wiring insulation.
7. The cause of the light bulb coming on could also be a faulty fuel pump. You should stop and listen to the sounds the fuel pump makes. A smooth hum without clicks or pauses is considered normal. If they appear extraneous sounds, the pump should be dismantled, washed inside and the filter cleaned.
8. Serious engine malfunctions can be indicated by the coolant temperature. If it is above 85–90 degrees, and the Check engine lights up while driving, the engine is definitely faulty. In this case, it is advisable to call a tow truck or drive at low speed to the nearest car service center.

We have already noted that the Check light comes on every time you start the engine in yellow or orange. This is normal if the flashing lasts no more than 3-4 seconds and stops when the other dashboard lights flash. Otherwise, follow the steps recommended above.

Video: Check sensor lights up

https://www.youtube.com/embed/uqdKfKX4MlE

Table: reasons for the Check engine light to come on and suggested actions

Resetting or zeroing the Check indicator

In most cases, as the table shows, Check lights up when a sensor fails or the operating conditions of the vehicle change. However, even after diagnosing and eliminating the malfunction, the light sometimes continues to light.

The fact is that the “trace” of the error remains in the computer’s memory. In this case, you should “reset” or “zero” the indicator readings. You can easily do this yourself by performing a number of simple operations:

The sensor is reset and the Check light is no longer on. If this does not happen, contact the service center.

When the Check Engine light comes on on the dashboard, you almost always need to stop the car immediately. Using the recommendations given in this article in practice will help you avoid complex, expensive engine repairs. Good luck on the roads!