Car owners know that if the light is on on a Lada Priora, then it is better to deal with this problem promptly. The reasons why the Check Engine light is on may vary. If the light is on on a Priora, it is better to contact a service center to determine the cause of the breakdown, but you can figure it out without involving third parties.
As a rule, the appearance of a check in a car occurs suddenly, at the most inopportune moment. Many car owners cannot immediately understand the reason for the error light and begin to panic.
Modern cars, for example, Mercedes-Benz, Audi, VW or Porshe, have automatic diagnostics that scan all systems for errors and malfunctions. After automatic diagnostics, a decoding is displayed on the dashboard, but such diagnostics will not show the very reason for the engine error.
Let's look at the reasons why the check engine light comes on and how to eliminate it using the example of a Lada Priora car.
If the check light comes on when starting on a cold engine
If, when you turn on the ignition, there is no characteristic sound of fuel pumping, and the engine icon lights up on the panel, then most likely the relay supplying power to the fuel pump is faulty.
The exact location of this device depends on the specific vehicle model and may be in the immediate vicinity of the fuel injection control unit or near the fuse box. The reasons why the relay does not operate can be either a malfunction of the device itself or a failure of the fuse protecting it.
A faulty fuel pump relay must be replaced with a new one, and if the fuse blows, it is imperative to determine and eliminate the cause of this problem, since possible short circuits in the electrical wiring can lead to a car fire.
If there are problems with starting, a cold engine runs unstably, then the fuel injectors are probably clogged or their electrical wiring is faulty. To fix the problem, you need to flush the injection device and eliminate damage to the electrical control circuits.
The reason that the check signal lights up after starting the engine may be a malfunction of the device for absorbing gasoline vapors - the adsorber.
This happens if the absorbing element (activated carbon) becomes unusable or the solenoid control valve fails.
Many car owners remove the used adsorber due to the high cost of a new part. In this case, it is imperative to rewrite the firmware of the control unit in order to avoid the constant occurrence of errors in the system.
Often the warning indicator lights up without any problems with the motor due to simple inattention. A fuel tank filler cap that is poorly tightened in a hurry reduces the pressure in the gas lines by allowing air to pass through. This leads to increased gasoline consumption, which the ECU evaluates as a malfunction and then the check lamp turns on on the panel.
Another reason could be a faulty air flow sensor. To ensure the optimal composition of the fuel mixture, the control unit controls air consumption using readings from the mass air flow sensor (MAF). If the air filter is not regularly replaced, the working element of the air flow control valve becomes clogged with dust particles, which leads to distortion of its readings.
In such a situation, the ECU switches to calculating the air consumed by the engine using indirect methods and warns the driver of a malfunction through the “Check” switched on. Also, if the mass air flow sensor fails, the engine does not start well at subzero ambient temperatures.
Replacing an air flow sensor is quite simple, but the cost of the part itself, depending on the make and model of the car, can reach 10 - 15 thousand rubles. Therefore, it is better not to skimp on routine maintenance of the machine and promptly purchase and install a high-quality air purification filter.
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The occurrence of detonations during the combustion of gasoline in the cylinders is monitored using a knock sensor. If there is no information or a low signal level from the sensor, the ECU sends an error message to the dashboard.
Structurally, the sensor consists of a piezoelectric element and a resistor, so it cannot be repaired and can be replaced as an assembly.
The idle speed controller (IAC) is responsible for setting and maintaining the required speed in different engine operating modes. The regulator specially opens and closes the hole in the throttle body pipe for air dosing. As a result, the car can start moving immediately after starting the engine without a long warm-up.
Unstable operation of the engine at idle and an illuminated engine malfunction signal indicate a breakdown of the IAC and the need to replace it.
Priora: why the check is blinking or on - the main reasons
The diagnostic connector will help you “talk” to the electronic control unit and find out why the check light is on. Well, before you start diagnosing, check out the list of the most common Priora “errors”:
The reasons for the “Check” fire on a Priora (16 valves), as we see from the list, can be serious. There is no need to panic: when the “Check” light comes on, you need to immediately reach for the diagnostic connector. It’s funny, but earlier diagnostics were carried out in the service with special software, but today any error code can be displayed on your smartphone, deciphering it using a mobile reading device.
There is another reason for engine malfunction - low-quality gasoline.
If this causes the spark plugs to flood, you will see the “check” blinking. Low-quality gasoline can be sold at any gas station; experienced car enthusiasts advise carrying a couple of candles with them. Sometimes the “Check” light comes on due to gasoline and the engine stalls. If he continues to work intermittently, things will be bad.
“Check” should light up when the ignition is turned on. A malfunction is also considered to be the case when the check light does not light up when the ignition is turned on, that is, the ECU does not send a system check report stating that “the system is ready for operation” - there is a problem in the wiring. You need to get rid of the chek icon not so as to “hide all the problems”, but so that the process of processing the fuel mixture occurs in order. Otherwise, you will have to seriously repair the car.
Oxygen sensor
The "check engine" warning sign indicates a malfunction of the engine. First of all, you should check the operation of the oxygen sensor. It relates to the exhaust gas production system, so it shows the amount of oxygen that has not been burned in the combustion chamber of the engine. The device provides control of gasoline consumption on a Lada Priora car.
If the sensor is broken, the vehicle's computer control system does not receive the necessary data, which can cause fuel consumption to increase and engine power to decrease. There are up to 4 oxygen sensors depending on the car model. At home, you can use a computer error scanner, or you can contact a service center.
Why does the oxygen sensor break down? The older the car gets, the larger the layer of used engine oil on the parts, which reduces the correct operation of the sensors. If you do not change and check the condition of the oxygen sensors in the Lada Priora, the catalyst will break, which may burst and lead to serious repairs. New catalysts are expensive due to the presence of valuable metals in them, so it is better to focus on preventing the problem. If the check engine light comes on, you need to look into the sensors and determine the reasons.
When the seal is broken
When the check engine light comes on, you need to check the tightness of the fuel system; this is the reason why the light may be on. Don’t immediately suspect serious damage; start with small but important details. If there is a leak in the fuel system, air escapes somewhere in the fuel tank filler cap. This increases the overall fuel consumption, a malfunction occurs, so the system reports an error.
Check the engine operation of the Priora by ear. If the “check engine light” is on, the car is still running at normal power, there are no extraneous sounds from the running engine, no knocks, hums or squeaks, then the problem is the tightness of the fuel tank. From a technical point of view, it may be that the lid is not tightened enough or there is a crack in it. Correct what you can do with your own hands and see if the light on the Priora continues to light. Perhaps the problem will be solved after tightening the cover or replacing it.
Another problem that leads to a burning “check” is the exhaust gas catalyst on the Lada Priora. It serves to clean exhaust gases. Without a properly functioning part of this type, not only the driver suffers, but also the environment, as the composition of the exhaust gases deteriorates. The catalyst converts carbon monoxide and has an important function. This is also dangerous for the driver, and it is undesirable to drive with a malfunction of this kind. If the problem is in the catalyst, then the power will decrease by 2 times. In this case, a warning message will light up on the dashboard. Press the gas pedal and analyze the dynamics of acceleration.
If you take care of your car and perform regular maintenance, there should be no problems with your exhaust catalyst. It should be understood that one small problem on Priora can lead to other, more serious consequences.
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If the catalyst breaks down, it is better not to use the car, since the serviceability of the engine is in question. Increasing fuel consumption will not lead to anything good; problems with engine traction will begin. Replacing your exhaust catalytic converter is an expensive service, but it shouldn't be ignored. There is an alternative for this part: a flame arrester, but this cannot be considered an absolutely correct solution.
Replacing the catalyst yourself is an extremely difficult task, so it is better to contact a specialized Lada Priora service center.
Gasoline consumption increases
The job of the mass air flow sensor is to determine the amount of air needed to be added to the gasoline mixture so that the fuel ignites optimally. The reasons why the notification lights up may be related to electronics. If a breakdown occurs in the sensor, a signal is immediately sent to the system and the light comes on. At the same time, gasoline consumption increases, the quality of exhaust gases decreases, and engine power decreases. The car does not move smoothly, but with jerks. A Lada Priora with a faulty mass air flow sensor will have difficulty accelerating and will have difficulty starting in the cold season.
Most of the breakdowns occur due to incorrect installation of air filters during scheduled replacements. If you do not change the air filters in a timely manner, according to the maintenance rules, the mass air flow sensor can cause serious problems.
If the light indicating a malfunction is on, you should not drive like this for a long time.
An experienced driver will be able to recognize when fuel consumption is increasing. Contact the service center. Replacing the sensor is not an expensive service, it will be done quickly. The necessary part for a Lada Priora is not that expensive, and you can change it yourself if you wish.
Faulty spark plugs and more
When the light on the dashboard comes on, you should check the spark plugs. They perform an important function, as they serve to ignite the fuel composition. If the spark plugs are faulty, the spark will not be supplied correctly and the gasoline mixture will not ignite correctly. In some cases, ignition does not occur at all or occurs at irregular intervals. All this is harmful to the engine. Drivers immediately feel if there is a problem with the spark plugs, as the car begins to make sudden jerks when accelerating. The reasons for Lada tremors can be different, but it is mainly associated with candles.
It is important to monitor the operating time of the spark plugs; they have a service life that is best not to exceed. On average, a part requires replacement after 50,000 km. It all depends on your driving style, the quality of gasoline, the brand and equipment of the car.
When the check light is on on the dashboard, be sure to check the condition of the spark plugs. Saving on these parts can result in serious disruption of engine operation. Replacing spark plugs is inexpensive, so you should do it yourself or use the services of a service center. If the indicator problem was related to this part, immediately after installing a new one, the light will stop lighting. The spark plugs are located under the hood so they are easy to find and inspect. To do this you will need a spark plug wrench.
High voltage wires can also cause problems for your car's engine. If they deteriorate, current begins to flow poorly through them, and electricity flows poorly to the spark plugs. This reduces the spark strength.
Dealing with the lit “check” indicator on a Priora is much easier than you think. Some diagnostic steps for checking valves, sensors, spark plugs can be done independently, without contacting a service center. If the check light comes on, you need to take action immediately; you should not drive for more than 2-3 days in this condition, so as not to damage the engine.
How to diagnose the ECM
As I already said, when errors like check engine appear, the Priora car owner has two options: solve it yourself or you can contact a car repair shop. The car owner can use a portable mobile device to read the fault codes from the electronic control unit that contributed to the appearance of the check on the Priora vehicle.
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It is necessary to correctly understand the cause of Check Engine on Priora and decipher it. Some error numbers can be found in the operating book for the “heart” of the vehicle. The rest can be found on the Internet.
For example, if the check engine light is on, this means that the following causes of engine malfunction have arisen:
- broken track sensor;
- adsorber is faulty;
- The mass air flow detection device does not work.
Fault codes will tell you that one of the systems or components has failed and needs to be replaced.
Triggering of the check lamp after washing the car
Sooner or later, every car owner has to wash the power unit. This may be due to leakage of oil or other operating fluids, settling of dust and dirt on a wet engine, or it may be required after repair work.
If you carelessly pre-protect the components from moisture or overdo it with a high-pressure washer, then after turning on the engine will stutter and stall, and the “Check engine” signal will turn on on the dashboard.
These problems are most likely associated with a malfunction of the car's electrical system: unreliable contacts of high-voltage wires, ignition coils and other electronic units. There are known cases when water pressure knocked loose plugs from the connectors of control sensors.
The malfunction should be resolved by checking and thoroughly drying all connectors in the engine compartment. For additional reliability, moisture-displacing grease for electrical contacts can be used in suspicious areas.
In conclusion, it is worth noting that the “Check engine” signal always means that there is some kind of problem. If the check light is on, but the engine is running normally, the driver still needs to determine the reason for the warning light turning on and eliminate it as soon as possible.
What to do when the Lada Priora engine troits
Lada Priora engine repair
in artisanal conditions it depends on the cause of the malfunction:
- If the combustion of the windings of the injector parts is to blame, remove the cover, and then remove the manifold. Assess the condition of the windings and measure the resistance using a multimeter. The best resistance level is from 11 to 15 ohms. At the lowest level of values, the winding must be replaced.
- If the resistance indicates normal characteristics, remove the fuel rail and thoroughly wash each part with water. However, it is harmful to take on a deficiency in this category if you do not have the ability to repair it - be as careful as possible. For flushing to be successful, open the valves suitable for the nozzle, and then apply an aerosol-type flush under pressure.
- If you have doubts about fuel, completely drain the old one and fill the engine with 8 or 16 valves of 95 gasoline. A high octane number is not advisable; on the contrary, this option may lead to overheating of the engine. If changing gasoline does not help, then change the air and fuel filter units.
- How to check if a spark plug is working properly? It’s actually simple - let the car cool down well, otherwise, when you start unscrewing the elements, you can get a severe burn. After switching off, after just a little ignition, the faulty spark plug will be moistened with gasoline. Also see if the candle can create a spark.
If it is impossible to repair the spark plug so that the engine stops firing , it is completely replaced, and it is not at all necessary to go to 100. Armed with a 10-12 key, turn off the elements responsible for the ignition. Then carefully clean the spark plug from dust, otherwise debris may get into the Lada Priora
.
A tire compressor is suitable for this procedure; in the latter case, a brush. Then remove the spark plug with a spark plug wrench, where the head with the gasket is certainly fixed. New devices are installed with the same screwing.
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PRINCIPLE OF OPERATION OF CARS WITH ECM (ELECTRONIC ENGINE CONTROL SYSTEM)
Cars with conventional carburetor engines have been replaced by those in which fuel enters the cylinders through an injection system. This sparking does not occur in the distributor (distributor), but in a special ignition module. This rather complex system is controlled by a special intelligent device. You could say computer. It is he who sends signals that activate all actuators. Therefore, the entire ECU system can be divided into three parts.
- Computer (ECU).
- Actuators (injectors, spark converters, etc.).
- Sensors (air, oxygen, throttle opening, crankshaft position, etc.).
