What to do if the Audi A6L 2 0 wastevalve is faulty and the light is on

What year of car?

Let's take a look at the wastegas valve and throttle opening, these two account for a relatively large proportion, if not these two, use the computer to detect and detect.

Hello friend, it is recommended to check the EGR solenoid valve.

If the car has a yellow fault light that has been on, and there is an obvious idle speed fluctuation of high and low, what is the reason, we will analyze a case to explain this kind of situation. First of all, we have to figure out two aspects, one is the yellow fault light, the car can drive normally; The second is that there is a noticeable instability in the idle speed.

Audi A4L drove 50,000 kilometers, the yellow light suddenly appeared in the driving situation, restarted several times without extinguishing, and when the red light was slightly shaken, the speed from D gear back to N gear will be from 800 to 1000 rpm, and then fall down, and then idle instantaneous fuel consumption has not been turned on before. The car can still be driven, and the engine is not abnormal, and later the inspection determined that the exhaust valve is broken, and the car will be fine after replacement.

50,000 kilometers of exhaust gas valve aging, so the question is, what is the root cause of premature aging of the waste valve? High temperature, high temperature comes from **, the oil circuit is dirty, dirty, impurities, and the combustion is not good due to excessive moisture, and the carbon deposition exceeds the standard for a long time. Therefore, the working conditions are constantly working at the critical point of the engine, the exhaust valve is prematurely aged, if it is only to replace the accessories, there will be turbocharger failure in the future, the piston failure in the cylinder, so, the exhaust valve has been damaged, it reminds us of a wake-up call, we should clean the oil circuit several times in a row, we unit car, 3000 kilometers, clean the oil circuit with Si Youpu original liquid, the same car exhaust valve 12w kilometers have not been replaced, and do not burn oil.

Generally, the engine failure light is on, and it is possible that the state of combustion is not particularly good, and the state of the general engine is not good, which is the main reason for the amount of engine failure light. There is also an engine guarantee that will also cause the fault light to be on, such as the car is weak, and the engine noise is too loud, or there is a significant knocking sound. So it's still necessary to do some regular maintenance and repairs.

Hello, if the car is in cold start state, or is ready to start state.

Generally, it may be a vehicle self-inspection.

This is nothing to worry about.

However, if the engine fault light is still on after starting.

Then you need to go to the test.

Hurry up to the 4S shop and let the professional repairer show you!

The engine fault light is on.

Copy is usually like bai under the reason:

1. The combustion state is not.

The bad combustion state of the engine is the main reason why the engine failure light is on.

2. Engine knocking.

There are usually three scenarios:

The first case: the car is weak;

The second case: the car is weak and the engine noise is too loud;

The third case: there is an obvious knocking sound.

In the first case, some engine fault lights will turn on, some will not, and in the second and third cases, the engine fault lights will inevitably come on.

3. The internal reason why the engine failure light is on.

1) The fuel quality is not good.

2) The inside of the engine cylinder is not clean and there is carbon deposit.

The cause of the fault can only be known through computer decoding.

I can't do this car by myself, so I went to the repair shop and tested it with a computer.

If the engine.

There are many reasons why the faulty light is on, and it is recommended to check it. If there is an abnormal engine noise, stop the engine immediately and turn off the ignition, and do not start again. Possibly.

The fault is not hit, just.

Minor problems such as dirty valves.

Hello: The fault light is on, which means that there is a fault, there is a special computer to detect, the fault code reported, the right medicine, thank you, willing to answer to help you. Have a nice ride. [Car questions, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

What is the reason why the Audi A6L engine failure light is on The new car does not have a problem with accessories, mainly because it burns badly, and the quality of the fuel added recently is related, and it is not that refueling 98 at a large gas station is equivalent to no problem. The phenomenon is that if the oil is not extinguished, and the oil is not extinguished, then the fuel injector may be a little blocked, or there may be slightly more impurities in the oil circuit and fuel tank. Impurities in the oil circuit will affect the combustion jitter.

How can there be so many impurities in a new car? This has nothing to do with the new car, even if the large gas stations have cleaned the underground oil tank, no one will guarantee that the oil impurities added each time will not exceed the standard. And the gas station has to be clean, not to mention that the fuel tank of our car is not clean, and the oil circuit is definitely not clear...

Direct injection engine is not like EFI, direct injection is very sensitive to fuel combustion, and a high compression ratio is also an important factor in sensitive combustion... Therefore, it is recommended that you clean the refueling tank with Si Youpu cleaning agent, which is generally clean after 500 kilometers, and there is no major problem with the new car. After cleaning and combustion, it will not shake,,, and do not add high-grade fuel, which does not have the function of clean oil circuit, which can only cover up the problem of poor combustion, which will cause greater damage.

Some petrol stations also have the ability to clean the tanks. As for why Europe and the United States add less additives, it is because the European and American fuel gas stations themselves have blended additives and then sell refined oil, after 2008, our country is to sell oil products without additives before 2008 is sold together, so now the fuel we use can also be called bare oil. That's a big difference.

In addition, the world's famous cleaning agent additives companies are basically a hundred years old, basically in Europe and the United States, their additives are sold directly to the gas station, otherwise it would have been closed, this will be known.

Engine failure signals are sent by the ECU (Engine Computer), which controls all the electronics throughout the engine and requires computer detection.

In the design of the car, in order to ensure that the engine is in good working condition and the normal service life of the engine, an oxygen sensor is designed and installed on the engine to monitor the combustion state of the engine. Once the engine burns badly, it will not only pollute the environment, but also cause fuel waste and excessive wear and tear on the engine.

After the engine fault light is on, if it is not solved in time, it will often be accompanied by deterioration of automobile exhaust quality, environmental pollution, increased fuel consumption, waste of fuel resources and RMB resources, increased combustion chamber temperature, reduced fuel economy and other problems of wear and tear, which may lead to early damage to the engine.

1. Identify the cause of the failure. For diagnostics of such faults in which the engine does not start, the battery should be tested first. It is necessary to find out if the engine does not start because the battery is insufficient.

2. Detect ignition timing. Timing belt slippage is the root cause of the failure that there is no electric spark and the engine cannot start.

3. Detect the starting system. In the case of faults such as engine failure to start, the first thing to do is to check the circuitry in the engine starting system. From the perspective of the most basic composition, the circuit of the starting system generally includes the following basic parts, that is, the battery, the starting motor and the cable connecting these parts.

Of course, in addition to this, ignition switches, starter relays or solenoid coils, as well as in-vehicle anti-theft systems, are also important components of the starting system.

4. Detect the quality of electric sparks. Once the circuitry of the starting system has been tested and proven to be fine-tuned, attention should be focused on why the engine is not working. Generally speaking, the ignition system of the engine is tested first, which is also the easiest inspection job.

In early ignition systems, you could easily remove the ignition coil and use a spark detector to detect if the spark was normal. When choosing a spark detector, an adjustable detector is preferable to a fixed design because it allows you to adjust the detector to a smaller gap so you can tell if there is no spark at all, or if there is an electric spark but it is weak.

5. Detect the fuel system. The diagnosis of the fuel system can be divided into two parts: the diagnosis of the fuel supply system and the diagnosis of the injector circuit system.

The fuel supply system can be detected by measuring the flow and pressure of the fuel. The best way to measure fuel flow is to inspect the line when there is a load in the fuel supply line.

The engine fault signal is sent by the ECU (engine computer), and the ECU controls all the electronic equipment of the entire engine, which needs to be detected by the computer.

In the design of the car, in order to ensure that the engine is in good working condition and ensure the normal working life of the engine, an oxygen sensor is designed and installed on the engine to monitor the combustion state of the engine.

After the engine fault light is on, if it is not solved in time, it will usually be accompanied by the deterioration of the exhaust quality of the car, the pollution of the environment, the increase of automobile fuel consumption, the waste of oil resources and RMB resources, the increase in the temperature of the combustion chamber, the aggravation of wear, which may lead to early damage to the engine.

4S shop processing, if you have a 5053 data cable and software in hand, you can also manually clear the fault code.

However, if there is a fault, it is still necessary to analyze the cause, and if it will still appear after clearing the fault code, it is recommended to thoroughly check the cause of the problem.

The computer detects the fault and the light goes off after it is eliminated.

The light was lit up, proving that the exhaust emissions were not up to standard. You can roughly judge whether the engine is shaking or not. If the engine is shaking, you need to check the corresponding ignition and fuel injection system. Stop.

The symptoms of Audi A6L exhaust valve failure are: idle shake high and low, exhaust emission light on; The body has a shaking feeling, and sometimes it can't be oiled; Loosen the oil cap and feel a lot of suction when you take it off. The exhaust valve, also known as the oil separator and pressure control valve, is installed between the compressor outlet and the condenser inlet to improve the heat transfer effect in the condenser and evaporator by separating it.

Causes of Wastevalve Damage:

1. The quality of the exhaust valve itself;

2. Improper use and maintenance of the exhaust gas valve;

3. The car accidentally added low-purity gasoline and fuel treasure and other substances after the sudden exhaust valve was damaged.

4. The waste Keesh reed valve works at the high temperature of the engine, and after a long time, it will age like the valve chamber cover gasket and rubber ring.

Effect of Wastegate Damage:

1. The function of the automobile exhaust valve is to make the automobile exhaust gas recirculate into the cylinder for combustion. After the exhaust gas valve is damaged, the amount of exhaust gas circulation cannot be controlled, and excessive exhaust gas participation in recirculation will affect the ignition and performance of the mixture, thereby affecting the power of the engine, especially when the engine is idling, low speed, small load and cold engine, the recirculated exhaust gas will obviously affect the engine performance.

2. After the exhaust gas valve is damaged, it will cause the car to burn engine oil, and the exhaust blue smoke will be serious. The reason is that the core slag of the waste gas valve is also equivalent to an oil-gas separator, which only sucks the pulse with exhaust gas and does not absorb oil when it works normally. When the exhaust valve is damaged, it loses the function of oil and gas separation, and sucks in the oil at the same time as the inhalation, so that the oil enters the intake tract and the combustion chamber, resulting in the phenomenon of burning engine oil, and the exhaust blue smoke is serious.

Photo by Zhang Fengxue of Pacific Automobile Network).