The "check" on the VAZ-2114 is on: possible causes and solutions

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

VAZ-2114 is a very common car in Russia. This car is loved for its maintainability and low cost of maintenance. The car will not require a lot of money in the event of a breakdown. But, unfortunately, sooner or later the "check" of the VAZ-2114 engine will light up on the instrument panel. Do not be upset and panic - most of the causes can be eliminated with your own hands. In today's article, we will look at why the "check" on the VAZ-2114 is on, and also how to solve this problem. This information will be very useful.

The "check" on the VAZ-2114 is on: reasons

Below we list the main reasons why this lamp lights up on the instrument panel:

• Errors in the electronic control unit of the internal combustion engine.
• Problems in the ignition system.
• Lambda probe.
• Catalyst.
• Problems in the fuel system.
• Mass air flow sensor malfunction.

Let's take a closer look at all these reasons.

Electronic control box

The device "Lada-2114" has an electronic control unit. This mechanism directly affects how the VAZ-2114 engine works. The "check" may be lit from time to time. This is due to a software bug. Also, the lamp lights up due to the accumulation of various errors during operation.

So, the "check" is lit on the VAZ-2114, the engine is working properly. How can this problem be solved? The simplest solution is to reset errors by connecting the scanner to the diagnostic connector. But if this action did not help, and the "check" is lit on the VAZ-2114 and further, it is necessary to change the software to a newer one. From the factory, the firmware "January" is installed on the ECU. Now there are many versions of it, including custom ones. To use the new firmware, you need a K-line cable, as well as a tablet or laptop. But you need to be able to download the software correctly.

Butter

Of course, the VAZ-2114 ECU is not smart enough to read engine hours and tell the owner about the upcoming oil change. But the lamp may light up if it is low. You need to regularly monitor the oil level and change it in time. The interval is 10 thousand kilometers. Change the oil along with the filter.

Candles, BB wires, coil

If the VAZ-2114 car stalls, the "check" is on, or the engine "troit" at idle, you need to pay attention to the ignition system. The main elements are candles and high-voltage wires. Often, on domestic cars, a breakdown of candles or wires occurs. It is necessary to check these elements for serviceability and replace if necessary. The best way to check is to install a pre-made set of candles or wires.

So we can narrow down the search. If at least one candle is faulty, it is better to replace the entire set. Otherwise, it is highly likely that the breakdown will repeat again, only on a different cylinder. It is also recommended to check the spark plug gap between the center and ground electrodes. Over time, this gap increases. The normal indicator should not exceed 1.3 millimeters. If the gap is larger, it can be corrected by bending the side electrode closer to the central one. If the distance between the electrodes is too large, it is difficult for a spark to form. Part of the fuel mixture will simply go into the air. Typically, the resource of candles is 20 thousand kilometers. Some install iridium, as they last longer. But as motorists say, it makes no sense to overpay. The characteristics of the internal combustion engine will remain the same, and the cost of such candles is equivalent to three or four sets of ordinary ones, which are no worse.

Rarely at the VAZ, the ignition coil itself fails. At the same time, the “check engine” lamp is lit on the instrument panel. The motor may troit, start badly, or stall. The coil is not subject to repair and is changingcompletely new. As for the wires, they can be checked by measuring the resistance.

Poor quality fuel

This is another reason why the check engine light is on the VAZ-2114. The difficulty is that it is impossible to determine the quality of the fuel at each refueling, and it will take a long time to roll out such gasoline. As a rule, the lamp itself disappears after a new refueling.

Pump

This is not about water, but about fuel. In the event of a malfunction, the machine may behave strangely, and the “check” will also be lit on the panel. Usually the cause is low blood pressure. The filter may be clogged. Both need to be looked at. This is a coarse and fine filter. The first is a grid near the pump, and the second is separate from it and has its own housing.

It also happens that the pump itself burns out. This is especially true on machines with LPG. Some owners do not turn off the fuel pump when switching to gas and, in addition, drive with a practically “dry” gas tank.

Injector

Over time, fuel injectors can become clogged at the VAZ. The machine stops working stably, consumption may increase and traction may disappear. In addition, the "check" lamp lights up on the instrument panel. It is recommended to flush the injector at a specialized stand in the service station. Do not use flushing that is poured into the tank for this. There is a risk of getting problems with the fuel system.

Oxygen sensor

This is one of the most common reasons why the check is on the VAZ-2114. All "Frets" of this model are produced withcatalytic plant. As a result, it needs an oxygen sensor to function properly. According to it, the ECU is guided by which further to set the ignition timing, as well as the composition of the mixture.

If the sensor stops giving information or sends incorrect data, the ECU will take the average values as a basis, and the “check” will light up on the instrument panel. What is the solution to this problem? Many simply put a snag. The best option is to install a mechanical blende. It is screwed into a regular hole and imitates the work of a lambda probe. The ECU receives constantly the same, normal lambda value. Such a sensor will no longer be able to break, as it has a special coating.

Catalyst

If the car's mileage is less than 100 thousand kilometers, most likely it still has a catalyst. By this run, it may already clog up and not perform its direct function. Inside the catalyst there are small honeycombs on which soot accumulates over time. As a result, the gases cannot leave the combustion chamber normally, and the engine "suffocates".

What is the solution to this problem? It's simple: instead of a standard catalyst, a flame arrester or just a straight pipe is installed. Another, the most budgetary solution is the mechanical removal of the ceramic core of the catalyst. Access is provided after opening the case with a grinder, after which the hole is welded. It will not harm the engine. The maximum that will change is the smell of exhaust gases and theirtoxicity. But since we do not yet control any environmental standards, owners of used VAZs and foreign cars are completely getting rid of catalysts. The cost of a new element is more than 20 thousand rubles, and there are almost none in stock.

Mass Fuel Flow Sensor (MFFS)

This element is available in any injector VAZ. It is a plastic element, inside of which there is a thin platinum thread. When the driver turns on the ignition, voltage is applied to this thread, which raises the temperature due to the high resistance. When the motor starts, the air that enters the nozzle cools this thread. As a result, the resistance and voltage change. This information is read by the controller. So the control unit "knows" how much air has passed through the mass air flow sensor.

If the sensor is faulty, the ECU puts it into emergency mode. At the same time, “check” is lit on the panel. Indirect signs of a malfunction of the DMRV are:

• Unstable engine idling.
• Long engine start.
• Poor acceleration dynamics.
• High fuel consumption.

What to do if the VAZ-2114 does not start and the "check" is on? The sensor is not repairable, it changes entirely.

If a car with LPG

Some owners install LPG equipment on the VAZ. If a fourth generation system is mounted, it will definitely interact with the engine electronics. In the event of a pressure drop in the gas line or a malfunctionreducer on the panel, the yellow lamp may light up. Further diagnostics are recommended to be carried out already at a specialized service station.

Also note that a car with HBO has its own "check", a gas filter. Sometimes they forget to change it. The recommended replacement interval is 30 thousand kilometers. In many ways, the condition of this filter depends on the quality of the gas being filled.

Conclusion

So, we found out why the “check” is on the VAZ-2114 car. As you can see, this lamp can appear for various reasons. In most cases, these are problems with the ignition or exhaust system. You can fix these problems yourself. But it is better to entrust the ECU firmware or HBO diagnostics to professionals.