The Check indicator lights up: we are looking for reasons

The name of the Check Engine indicator literally translates as "Check Engine". However, the engine, when the light comes on or flashes, may not be at all to blame. A burning indicator may indicate problems in the fuel supply system, failure of individual ignition elements, etc.

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

The sensor is usually located on the dashboard of the car under the engine speed indicator. It is indicated by a schematic engine or a rectangle labeled Check Engine or simply Check. In some cases, lightning is depicted instead of the inscription.

Is it possible to continue driving when the light is on

The main situations in which the indicator lights up and the recommended course of action for the motorist:

We have already noted that Check lights up every time the engine is started in yellow or orange. It is normal if the flashing lasts no more than 3-4 seconds and stops along with the flashing of other instruments on the dashboard. Otherwise, follow the steps above.

Video: Check sensor lights up

In most cases, as can be seen from the table, Check is turned on when the sensor fails or the operating conditions of the vehicle change. However, even after diagnosing and troubleshooting, sometimes the light is still on.

The fact is that the "trace" of the error remains in the computer's memory. In this case, you need to "reset" or "zero" the indicator readings. You can easily do it yourself by following a few simple steps:

The sensor is zeroed and the Check LED is no longer lit. If this does not happen, contact the service center.

The Check Engine light on the dashboard almost always requires the vehicle to be stopped immediately. Using the recommendations given in the article in practice will help you avoid complex and costly engine repairs. Good luck on the roads!

What is an oxygen controller and what functions are assigned to it, not every Lifan Solano car owner can say with certainty. The probe that controls the oxygen concentration in the exhaust gases is a lambda probe. With its help, the car's ECU controls and regulates the air-fuel mixture. Thanks to the lambda probe, the quality of the air-fuel mixture is corrected in a timely manner, this ensures the correct operation of the engine.

The principle of operation of the oxygen sensor and why the snag of the lambda probe Lifan Solano is installed

Tighter environmental regulations for cars are forcing manufacturers to install catalytic cells in the exhaust system, which reduces the concentration of toxic substances in the composition of exhaust gases. The performance of this vehicle unit directly depends on the composition of the air-fuel mixture, which is controlled by the lambda probe.

The excess air volume is measured by the amount of residual oxygen in the exhaust gases. It is for this purpose that the first oxygen regulator is installed in the exhaust manifold, in front of the catalyst. The signal from the oxygen controller enters the car's ECU, where the air-fuel mixture is processed and optimized. A more accurate supply of fuel by nozzles to the combustion chambers of the engine is carried out.

Important! In cars manufactured in recent years, second controllers are also installed behind the catalysis chamber. This helps ensure accurate air/fuel mixture preparation.

Two-channel controllers are produced, very often they are installed both on cars manufactured in the 80s of the last century, and on new economy class cars. There are also broadband probes, they are installed on modern machines belonging to the middle and upper class. Such controllers can accurately detect deviations from the required norm and make timely adjustments to the composition of the air-fuel mixture.

The condition for the normal operation of the oxygen regulator is the location of the working part inside the exhaust jet. The oxygen sensor consists of a metal case, a ceramic tip, a ceramic insulator, a coil with a reservoir, a current collector for electrical impulses and a protective screen. There is a hole in the oxygen sensor housing through which exhaust gases exit. The materials used in the manufacture of oxygen sensors are resistant to heat. As a result, they operate at high temperatures.

The sensor converts data on the oxygen content in the exhaust gases into electrical impulses. The information is transmitted to the injection controller. When the amount of oxygen in the exhaust changes, the voltage inside the sensor also changes, an electrical impulse is generated, which enters the computer. There, the boost is compared with the standard one programmed into the ECU, and the injection duration is changed.

Important! Thus, the highest degree of engine efficiency, fuel economy and a decrease in the concentration of toxic substances in the exhaust gases are achieved.

Symptoms of a Lambda Probe

The main signs by which we can talk about the failure of the controller:

Causes that can cause an oxygen sensor to malfunction

The oxygen controller is an exhaust system assembly that can be easily broken. The car will go, but there will be a significant decrease in its dynamics, fuel consumption will increase.

Important! In such a situation, the car needs urgent repairs.

A malfunctioning oxygen controller can be caused by reasons such as:

Diagnostics of malfunction of the oxygen sensor

Important! Special equipment is required to diagnose the operation of the oxygen controller. To carry out this operation, it is best to contact a car repair shop. Experienced specialists will quickly and efficiently determine the cause of the malfunction of your car and offer options for solving the problems that have arisen.

Disconnect the wires from the controller connector and connect a voltmeter. Start engine, speed up to 2,5 mph, then slow down to 2 mph. Remove the fuel pressure regulator vacuum tube and record the voltmeter reading. When they are equal to 0,9 volts, we can say that the controller is working. If the reading on the meter is lower or it does not respond at all, the sensor is faulty.

To check the performance of the regulator in dynamics, it is connected to the connector in parallel with a voltmeter, and the crankshaft speed is set to 1,5 thousand per minute. When the sensor is working, the voltmeter reading will correspond to 0,5 volts. Otherwise, the sensor is defective.

Additionally, diagnostics can be carried out using an electronic oscilloscope or multimeter. The controller is checked with the engine running, because only in this state can the probe fully show its performance. It must be replaced even if slight deviations from the norm are found.

Replacing the oxygen sensor

When the controller gives a P0134 error, there is absolutely no need to run out and buy a new probe. The first step is to check the heating circuit. It is believed that the sensor performs an independent test for an open circuit in the heating circuit, and if it is detected, error P0135 will appear. In fact, this is what happens, but small currents are used for verification. Therefore, it is only possible to determine the presence of a complete break in the electrical circuit, and it cannot detect poor contact when the terminals are oxidized, or when the connector is unscrewed.

A bad contact can be determined by measuring the voltage in the driver's filament circuit. In this case, you must be "at work". It is necessary to make cuts in the insulation of the white and purple wires of the controller and measure the voltage in the heating circuit. When the circuit is running, when the engine is running, the voltage changes from 6 to 11 volts. It is completely useless to measure the voltage on an open connector, because in this case the voltage will be recorded on the voltmeter, and disappear again when the probe is connected.

Usually in the heating circuit, the weak point is the lambda probe connector itself. If the connector latch is not closed, which happens quite often, the connector vibrates to the side and the contact deteriorates. It is necessary to remove the glove box and additionally tighten the probe connector.

Important! If there are no faults in the filament circuit, the entire sensor must be replaced.

To replace it, you will need to cut the connectors from the two sensors and solder the connector from the original sensor to the new controller.

When the replacement of the oxygen handler occurs when the catalyst chamber is removed or replaced, an obstruction is placed on the oxygen handler.

Important! The hook must only be installed on a working lambda probe!

Fake lambda probe Lifan Solano

The lambda probe trick is needed to fool the car's ECU after removing the catalytic chamber or replacing it with a flame arrester.

Mechanical hood: mini-catalyst. A special gasket made of heat-resistant metal is put on the ceramic tip of the driver. There is a small piece of catalytic honeycomb inside. Passing through the cells, the concentration of harmful substances in the exhaust gases decreases, and the correct signal is sent to the car's ECU. The replacement control unit does not notice, and the car engine runs without interruption.

Important! An electronic nuisance, an emulator, a kind of mini-computer. This type of bait corrects the readings of the oxygen sensor. The signal received by the control unit does not arouse suspicion, and the ECU ensures the normal operation of the engine.

You can also reinstall the vehicle control unit software. But with such manipulation, the environmental status of the car is lowered, and environmental standards are reduced from Euro-4, 5, 6 to Euro-2. This solution to the problem of the oxygen sensor allows the car owner to completely forget about its existence.

It is no secret for the driver of Lifan Solano (620) that the indicator on the dashboard "Check-Engene" is a sign of a Lifan malfunction. In the normal state, this icon should light up when the ignition is turned on, at this time the check of all Lifan Solano (620) systems begins, on a running car, the indicator goes out after a few seconds.

If something is wrong with the Lifan Solano (620), then the Check Engineer does not turn off or turns on again after a while. It may also flash, clearly indicating a serious malfunction. This indicator will not tell the owner of Lifan what exactly the problem is, he draws attention to the fact that diagnostics of the Lifan Solano (620) engine are required.

There is a large number of specialized equipment for diagnosing the Lifan Solano (620) engine. There are compact and fairly versatile scanners that not only professionals can afford. But there are times when conventional hand-held scanners cannot detect malfunctions of the Lifan Solano (620) engine, then diagnostics should be carried out exclusively with licensed software and the Lifan scanner.

Lifan diagnostic scanner shows:

1. To diagnose the Lifan Solano (620) engine, first of all, a visual inspection of the engine compartment is performed. On a serviceable engine, there should be no stains from technical fluids, whether it be oil, coolant or brake fluid. In general, it is important to periodically clean the Lifan Solano (620) engine from dust, sand and dirt - this is necessary not only for aesthetics, but also for normal heat dissipation!

2. Checking the level and condition of the oil in the Lifan Solano (620) engine, the second stage of the check. To do this, pull out the dipstick and look at the oil by unscrewing the filler plug. If the oil is black, and even worse, black and thick, this indicates that the oil has been changed for a long time.

If there is a white emulsion on the filler cap or if the oil foams, this may indicate that water or coolant has entered the oil.

3. Revision candles Lifan Solano (620). Remove all spark plugs from the engine, they can be checked one by one. They must be dry. If the candles are covered with a slight coating of yellowish or light brown soot, then you should not worry, such soot is quite a normal and acceptable phenomenon, it does not affect the work.

If there are traces of liquid oil on the Lifan Solano (620) candles, then most likely the piston rings or valve stem seals need to be replaced. Black soot indicates a rich fuel mixture. The reason is the incorrect operation of the Lifan fuel system or an overly clogged air filter. The main symptom will be increased fuel consumption.

Red plaque on candles Lifan Solano (620) is formed due to low-quality gasoline, which contains a large amount of metal particles (for example, manganese, which increases the octane number of fuel). Such a plate conducts current well, which means that with a significant layer of this plate, the current will flow through it without the formation of a spark.

4. The Lifan Solano (620) ignition coil does not fail often, most often this is due to old age, insulation damage and short circuits. It is better to change the coils according to the mileage according to the regulations. But sometimes the cause of the malfunction is faulty candles or broken high-voltage cables. To check the Lifan coil, it must be removed.

After removing it, you need to make sure that the insulation is intact, there should not be black spots and cracks. Next, the multimeter should come into play, if the coil is burned out, then the device will show the maximum possible value. You should not check the Lifan Solano (620) coil with the old method of detecting the presence of a spark between candles and a metal part of the car. This method is carried out on old cars, while on Lifan Solano (620), due to such manipulations, not only the coil, but the entire electrical system of the car can burn out.

5. Is it possible to diagnose an engine malfunction by the exhaust pipe smoke of Lifan Solano (620)? An exhaust can tell a lot about the condition of an engine. From a serviceable car in the hot season, thick or gray smoke should not be visible at all.

6. Lifan Solano (620) engine diagnostics by sound. Sound is a gap, so says the theory of mechanics. There are gaps in almost all movable joints. This small space contains an oil film that prevents parts from touching. But over time, the gap increases, the oil film ceases to be distributed evenly, friction of the Lifan Solano (620) engine parts occurs, resulting in very intense wear.

Each Lifan Solano (620) engine node has a specific sound:

7. Lifan Solano (620) diagnostics of the engine cooling system. With the cooling system working properly and sufficient heat removal after starting the engine, the liquid circulates only in a small circle through the stove radiator, which contributes to the rapid heating of both the engine and the heater interior. Solano (620) during the cold season.

When the normal operating temperature of the Lifan Solano engine (620) (about 60-80 degrees) is reached, the valve opens slightly in a large circle, that is, the liquid partially flows into the radiator, where it gives off heat through. When a critical level of 100 degrees is reached, the Lifan Solano (620) thermostat opens to the maximum, and the entire volume of liquid passes through the radiator.

This turns on the radiator fan Lifan Solano (620), which contributes to a better blowing of hot air between the cells of the radiator. Overheating can damage the engine and require costly repairs.

8. A typical malfunction of the Lifan Solano cooling system (620). If the fan does not work when the critical temperature is reached, first of all it is necessary to check the fuse, then the Lifan Solano (620) fan and the integrity of the wires are inspected. But the problem may be more global, the temperature sensor (thermostat) may have failed.

The operation of the Lifan Solano (620) thermostat is checked as follows: the engine is preheated, a hand is placed on the bottom of the thermostat, if it is hot, then it is working.

More serious problems may arise: the pump fails, the radiator on the Lifan Solano (620) is leaking or clogged, the valve on the filler cap breaks. If problems occur after changing the coolant, the airbag is most likely to blame.

Step-by-step instructions on how to check the Lifan Solano 620 catalyst review

Vehicles with multiport fuel injection use catalytic converters that burn off residual fuel and carbon monoxide. During operation, the mechanisms wear out, which negatively affects the performance of the car. It will help to find out the signs of wear of the converter on the Lifan Solano 620, how to check the catalyst, an overview of possible problems and methods for their elimination.