Instructions on what to do if the “Check Engine” light comes on

The check on Grant caught fire: possible reasons

So, you're on the road, and the engine icon lights up on the dashboard. On all cars this sign looks the same - it cannot be confused with anything else. How to understand what the reason is ?

There is an opinion: you can find out the error code if you enter the instrument panel into service mode . This is when the instrument needles jump in all directions, the display shows information about the car software version.

This is not true - you can find out the software. Error code - not always . You need an OBDII adapter like ELM327 with a display or Bluetooth connection to a phone with a program like Torque (free).

An OBD2 diagnostic adapter can be bought for pennies on Aliexpress. Whether he sees your car is a lottery, since this equipment is unprofessional.

System error

A software failure in the electronic control unit (ECU) can lead to any error being reflected, even if there is none in the engine. The error codes for which the ECU is responsible go from P0030 to P2501.

Errors related to automatic transmission : P0720 – P1701.

Data transmission problems : U0001 – U0305.

A malfunction in the electronic control unit will also appear on the instrument panel. Photo: Drive2 blog KurskCarTuning

Oxygen sensor

Granta divides errors into two oxygen sensors: before and after the converter. Problems with them from burning out.

Codes for the sensor before the neutralizer : P0030 – P0032 / P0130 – P0135.

After the neutralizer : P0036 – P0038 / P0136 – P0141 / P2270 – P2271.

Problems with sensor heating: P1102, P1115, P1135, P1141.

The oxygen sensor, also known as a lambda probe, is often removed when reflashing the car and replacing the exhaust with 4-2-1. If the sensor is on the car and fails, replacement will cost a lot of money.

UCH or CBCH error

What are UCH and CBKE? These are control units for all interior electronics on luxury versions of Lada.

Problems with TsBKE on Grant : turn signals do not work, window regulators take on a life of their own, etc. Replacing the unit is problematic; with labor and parts, expect about 4,000 rubles.

There is an option to transfer the electronics to a relay, as implemented on the Standard and Norma.

Replacing the TsBKE - removing the panel, or dismantling it through the removed instrument panel. Photo: ifoxli.ru

Problems with the mass air flow sensor

The mass air flow sensor (MAF) is installed under the hood immediately after the air filter.

• The car runs rough or won't start;
• The check is on;
• Increased fuel consumption (up to one and a half times).

Mass air flow sensor errors : P0101, P0102, P0103.

Instead of replacing, you can try washing the sensor with a cleaning agent.

Crankshaft position sensor

DPKV - crankshaft position sensor - also has its own set of possible errors: P0335, P0336, P0337, P0338.

Diagnosing the sensor is important, but often problems with it are immediately obvious. If the DPKV fails, the car simply will not start or will operate extremely unstably.

DPKV on Grant costs a penny and is easy to change. The sensor is located in the engine compartment on the oil filter side near the drive disc.

More articles on repair Grants at this link.

Troubleshooting methods

Now that all the causes have been identified, we can begin to consider troubleshooting. But, before we begin, it is worth noting that a car enthusiast needs to have an idea of ​​the design features of the engine if he wants to fix the problem himself. Otherwise, go directly to a car service center, in order to avoid other problems that, due to lack of experience, car enthusiasts usually create for themselves.

Sensors

Often, the reason why the check light on Kalina may come on is the failure of one of the sensors. Possible ones that are worth checking right away include: mass air flow sensor, idle speed control, crankshaft position sensor, oxygen sensor and coolant temperature sensor.

You can determine the cause by going through each sensor separately and using a tester to check their functionality.

But, there is a simpler and more effective way to determine the malfunction of a particular sensor, namely connecting to the electronic engine control unit. Here you can look at the errors and, by deciphering them, determine where the problem is.

How to reset an error on Grant

There are three ways to get rid of the “Check Engine” icon:

1. Fix the problem;
2. Reset using OBD2 adapter;
3. Reset without adapter manually.

We use OBD2 adapter

Do you have a high-quality diagnostic adapter and the necessary software on hand? Then resetting will not be difficult. What to do if there is no program or diagnostic scanner?

The easiest way out is to buy a scanner from China. Price – 200-300 rubles. The main condition: read reviews about compatibility. Whether he reads your car or not is a lottery.

What does it mean

ECU reset

- this is equivalent to turning off the ignition.

ECU initialization

— this is a complete power outage, with clearing of adaptation and self-learning data (learning injection time correction using lambda, learning IAC offset, in systems with a mathematical model, resetting starting fuel adaptation, SOP adaptation, torque adaptation, etc.)

Initialization

— creation, activation, preparation for work, determination of parameters. Bringing a program or device into a state of readiness for use.

If, after replacing the sensor with a working one or replacing the ECU with a new one, you do not reset and initialize the ECU, then the engine control system will not work correctly (for example, traction will be lost, jerking, jerking, etc. will appear).

Summarization and decoding of all error codes

All error codes for Grant can be found here.

The check engine light will not come on by itself. There is an indication - there is a problem in the car.

• Resetting does not cure the problem - the problem will not go away without intervention;
• For an easy and quick reset, OBDII scanner - you can buy a simple one for 200 rubles;
• You need to look at the error as soon as it appears - the problem can be either unimportant or critical for the use of the machine.

Write us comments and ask questions. We will answer everything we can!

A modern car is crammed with electronics. Multiple gauges and warning lights on the instrument panel indicate different faults. This progress did not bypass the Lada Granta. The most well-known signal is the “CHECK” function lighting up. This is an indication that there are problems with the operation of the engine or control unit.

In the video, check engine reset:

Why is the check engine light on Lada Granta?

The warning light is located on the instrument panel and if it lights up, it means something is wrong with the engine. On the Lada Granta, the check engine light comes on according to a signal from the control unit when any error or engine malfunction is detected. On modern cars, this sensor is integrated with many systems and components, so the signal can be associated with engine speed, the composition of the working fluid (gasoline or gas), fuel consumption, ignition and other systems. Therefore, it is difficult to immediately find out why the check caught fire, especially if you do not have the skills and certain experience.

If the Lada Granta engine light comes on, what does this mean:

• The indicator lights up when you start the car and then immediately goes out - there is no reason to worry, the engine is working properly.
• The check light is on and does not go out for a long time - a cause for concern, but there is no reason for serious worries, although an urgent diagnosis is required:

• The sensor signals while driving - you need to check the oil level. You should also make sure that the engine operates without unnecessary noise or knocking. In addition, it is necessary to inspect the engine housing for leaks;
• If the check light lights up during normal engine operation, then the spark plugs may be faulty or low-quality fuel has been filled.

Possible reasons for the check function to light up

The “CHECK” signal is located in the very center of the instrument cluster, where the driver can quickly pay attention to it.

Check engine light came on during hard acceleration

This function is responsible for the operation of the engine and if it signals, then there may be problems in the operation of this particular unit. Of course, this is scary for any motorist, because repairing the power unit is complex and expensive. But don’t immediately get scared and panic, the reason may be petty.

So, let’s look at what are the reasons why the “CHECK” function on the Lada Grant came on:

• If the indicator lights up when you start the engine, then don’t worry, everything works.
• If the “CHECK” lights up and signals for a long time, then, first of all, it is necessary to make a diagnosis, and only then worry.
• If there is a “CHECK” while driving, this may mean that there is insufficient oil level in the engine ( p0523 - error when the oil pressure sensor is faulty ).
• The “CHECK” function is on - it’s worth checking the engine for signs of depressurization or oil leakage.
• If the above reasons do not work, but the “CHECK” is lit, then this may be a signal that the spark plug has failed or low-quality fuel has been filled.

When the “CHECK” function lights up, it indicates that something is wrong with the engine and it is worth carrying out diagnostics before taking other actions.

Elimination methods

Let's consider some options for eliminating the causes of the “CHECK” function fire on the Lada Grant:

1. Bad fuel. The elimination method is quite simple - drain the low-quality fuel and fill in new one. Let the engine run a little and turn it off. If everything is normal, then upon startup, the signal will disappear. AvtoVAZ recommends refueling with 95 gasoline, but it often causes errors and complaints about its quality. What kind of gasoline do you fill up with, 92 or 95?
2. Spark plugs and high-voltage wires. Unscrew all spark plugs and check the gaps and the presence of a spark. Replace faulty spark plugs and wires.

Engine 21116 (high-voltage wires, oil dipstick)

Decoding codes after diagnostics with a scanner

As stated above, if the measured characteristics do not differ from the standard ones by more than 20%, then everything is in order with the car. What are the standard parameters?

New Lada: trunk light does not light...

conclusions

The reasons why the “CHECK” function lights up on the Lada Grant are quite simple, since this sensor is responsible for the full operation of the engine. To identify the causes, it is worth conducting a diagnosis and determining why this happened, and only then eliminating it.

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 the engine.

Car exhaust catalyst

An automobile catalytic converter helps the vehicle make this engine exhaust more environmentally friendly. It converts carbon monoxide and other harmful substances into harmless compounds. If your exhaust catalyst has become unusable, then you will notice it not only when the check engine icon appears, but also long before the moment when the power of your car drops by half. For example, when you press the gas pedal, your car will not have the same 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 in the car should not fail. The main reason for catalyst failure is untimely replacement of a faulty oxygen sensor, as well as irregular replacement of spark plugs after their expiration date. When the oxygen sensor or spark plugs are faulty, the conversion of carbon monoxide in the catalyst into harmless chemical elements stops, and this leads to overheating of the catalyst, which because of this can fail.

What does the Check Engine Light mean?

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

The Check indicator may light up for various reasons.

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?

The brake pads are worn out, 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 fuel consumption, unstable engine operation, and decreased traction characteristics of the vehicle. Moreover, in this case, the car owner may lose the guarantee for car repairs.

High voltage wires

Checking high-voltage wires is mandatory when diagnosing an engine when it is tripping. There should be no traces of breakdown on them. Spark plug tips must be clean and free of carbon deposits.

After visually inspecting the spark plugs, check the high-voltage wires. There should be no traces of breakdown: black dots or stripes. Due to the breakdown, the current does not reach the spark plugs. This defect is the next reason for the tripping of an internal combustion engine.

Checking the wires yourself will not cause difficulties. They are tested with a conventional multimeter. It is necessary to measure the resistance of each wire.

Video of checking BB wires

Check the wires with a multimeter. Measure the resistance of each wire. It differs for different car brands, but does not exceed 20 kOhm. Good wires have the same resistance. If one of them shows much less or more, then it is faulty and because of it the power unit is tripping.

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 fuel tank cap is lost or not screwed in properly. 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 all 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. A faulty fuel pump can also cause the light to come on. You should stop and listen to the sounds the fuel pump makes. A smooth hum without clicks or pauses is considered normal. If extraneous sounds appear, 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.