Buick Yinglang detects what is the fault of fuel enrichment in the fuel correction system

There is a malfunction

1. The mixture is too thick.

2. Check the air flow meter.

3. Oxygen sensor.

4. Carbon solenoid valve.

In the process of work, the equipment "loses the specified function" or endangers safety for some reason. Failures are sometimes referred to as a type of failure, or they can be lost in the work of the equipment or a failure, but these failures are repairable. The prescribed function refers to the function that is clearly specified in the technical documentation of the equipment.

In the process of work, the equipment "loses the specified function" or endangers safety for some reason. The prescribed function refers to the function that is clearly specified in the technical documentation of the equipment. Failures are sometimes referred to as a type of failure, or they can be lost in the work of the equipment or a failure, but these failures are repairable.

Fault check range that causes the mixture to be too thin or too thick:

1. The circuit of the oxygen sensor was measured, and the front and rear oxygen sensors were replaced.

2. Check the ignition coil.

The spark plugs were replaced.

3. Checked the air intake system, exhaust system and vacuum system.

4. Inspected the evaporative emission system.

5. The inlet flow sensor was checked and replaced, and the inlet temperature and inlet pressure sensor were also checked 6. The fuel pressure was measured, the fuel injector was checked, and the fuel pump and fuel filter element were replaced.

7. Check the engine crankshaft ventilation system.

8. The engine control module was replaced.

The mixture is too strong! [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

If the mixture is too thick, check the air flow meter, oxygen sensor, carbon solenoid valve, I hope it can help you, Buick 4S maintenance technician will answer for you [If you have a question about the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

If the fuel correction system is too thick, it may be caused by a poor proportion of the combustible mixture in the car, or insufficient combustion in the combustion chamber in the engine cylinder. There are many reasons for the failure of these two, which depends on the situation. However, sometimes the fuel correction system is too thick due to other reasons, and you need to go to the 4S shop for maintenance and testing to know the specific cause of the failure

Long-term fuel correction over-concentration maintenance treatment:

The reason may be that the air in the cylinder and the intake pressure are insufficient, resulting in the fuel in the cylinder not burning completely. Common problems are caused by carbon deposits in the throttle and air intake tract that are too dirty, clogging the three-way catalytic converter, carbon deposits in the spark plugs, and problems with the oxygen sensor.

1. Check the cleanliness of the throttle first, if the throttle is too dirty and there is carbon deposit, you need to carefully wash the carbon deposit of the throttle and intake;

2. Check whether the three-way catalytic converter is blocked, if it is blocked, clean it with a special cleaning agent first, and see if the effect is not good, you need to replace the new three-way catalytic converter;

3. Remove the spark plug to check whether there is more carbon deposit, clean the spark plug if there is more carbon deposit, check whether the spark plug is working normally after cleaning, and replace the spark plug if the spark plug jumps abnormally;

4. There is a multimeter to detect the voltage and resistance of the working state of the oxygen sensor, and there is a waveform that can be detected. If the oxygen sensor is damaged, it needs to be replaced.

The engine light is on, the detection is that the oxygen sensor is broken, the fuel correction is too thick, the oxygen sensor is replaced, the code is eliminated, after two days, the engine fault light is on again, or the fuel is too thick, and in the cold start, there is an unstable idle speed, if the system can correct the fuel is too thick, it should mean that the oxygen sensor is not necessarily bad, but the pressure of the injector or the oil pump may be too high, and the injector has oil leakage.

The mixing ratio of fuel to air has a suitable range: if the fuel DU exceeds the range, it is too concentrated. Otherwise, it is too thin.

Solution: Check the signal of the fuel injection sensor: whether the intake pressure sensor, water temperature sensor, and oxygen sensor signal are good, and then check whether the pressure of the oil pump is normal, whether the fuel injector is leaking, and repair the problem.

Summary. Hello! This is because the engine electronic control system detects that the mixture is too thin, and the computer board increases the amount of fuel injection within the controllable range, but the system detects that the mixture is still too thin, so this fault will occur!

There are several factors that can cause this failure:

Air intake system leaks.

Insufficient fuel pressure.

The injector is clogged.

The inlet pressure sensor is damaged.

The oxygen sensor is damaged.

Engine computer board and wiring failure.

Check the above links one by one, and repair the faulty parts to solve the problem!

Buick Yinglang failure**, fuel system correction is too thin.

Hello! This is because the engine electronic control system detects that the mixture is too thin, and the computer board increases the amount of fuel injection within the controllable range, but the system detects that the mixture is still too thin, so this fault will occur! There are several factors that can cause this failure:

Air intake system leakage - insufficient fuel pressure - fuel injector plugging - air intake pressure sensor damage - oxygen sensor damage - engine limb waxing machine computer board and line failure for the above links one by one, the needle head is slow to repair the fault part to solve the problem!

Have a great day!

P0171 fault code, which means that the system (air-fuel ratio) is too thin (row 1).

Fuel is too thin when the electronic control unit (ECU) controls fuel delivery by increasing or decreasing the time the injectors are on, resulting in the engine achieving the best air-fuel ratio (air-to-gasoline mass ratio: 1). Too strong an air-to-air ratio means that the fuel delivery volume is too large, and an air-to-air ratio is too thin to mean that the fuel delivery volume is too small.

This fault code can occur if the adaptive fuel control system has reached its compensation limit and the air/fuel ratio is still very thin. Causes of failure include air leakage after the air flow (MAF) sensor, PCV system leakage, oxygen sensor failure, exhaust leakage near the oxygen sensor, EGR leakage, air flow (MAF) sensor failure, dirty fuel filter, insufficient fuel pump supply, fuel pressure regulator failure, fuel injector blockage, engine speed sensor failure, electronic control module (PCM or ECM) failure, etc.

Whenever the car is troubleshooting, it is necessary to clear the fault code.

If the fuel correction system is too thick, it may be caused by an undesirable ratio of the combustible mixture in the car, or insufficient combustion in the combustion chamber of the engine cylinder. There are many reasons for the failure of these two, which depends on the situation.

The reason for the long-term fuel correction over-concentration repair treatment may be that the air in the cylinder and the intake air pressure are insufficient, resulting in the fuel in the cylinder not burning completely. Common problems are caused by carbon deposits in the throttle and air intake tract that are too dirty, clogging the three-way catalytic converter, carbon deposits in the spark plugs, and oxygen sensors.

1. Check the cleanliness of the throttle first, if the throttle is too dirty and there is carbon deposit, you need to carefully wash the carbon deposit of the throttle and intake;

2. Check whether the three-way catalytic converter is blocked, if the blockage is cleaned with a special cleaning agent first, to see if the effect is not good, you need to replace the new three-way catalytic converter with a bending balance;

3. Remove the spark plug to check whether there is more carbon deposit, clean the spark plug if there is more carbon deposit, check whether the spark plug is working normally after cleaning, and replace the spark plug if the spark plug jumps abnormally;

4. Use a multimeter to detect the voltage and resistance of the working state of the oxygen sensor, and the waveform can be detected. If the oxygen sensor is damaged, it needs to be replaced.

The above are common causes of problems, and sometimes the fuel correction system is too thick due to other reasons, and you need to go to the 4S shop for maintenance and testing to know the specific cause of the failure.

Photo by Car Selector) Mercedes-Benz S-Class M5 Ideal One Buick GL8 Xpeng P5 Xpeng Motors P7 @2019

Summary. Hello, dear; The reason why the 10-year Buick Yinglang fuel correction system is too thin is 1The air/fuel ratio sensor is malfunctioning.

This means that the air-fuel ratio is relatively low, which is caused by inaccurate fuel injection. The main reason for inaccurate fuel injection is damage to the air flow sensor and oxygen sensor. Workaround:

The data stream from the air/fuel ratio sensor needs to be checked to check for air leaks in the engine intake pipe. 2.It may be caused by the poor quality of gasoline.

Solution: Just change the gasoline. 3.

It may be that the engine's air intake system is faulty, causing the mixture to be too thin. Solution: It is recommended to check whether the air flow meter of the engine intake system is normal.

The Engine Control Module (ECM) controls the air fuel metering system to provide the best combination of power performance, fuel economy and emissions control. If the heated oxygen sensor shows a dilute state, the fuel adjustment value should be higher than 10%. If the heated oxygen sensor shows an over-concentrated state, the fuel adjustment value should be less than 10%.

The short-term fuel regulation value changes rapidly as the voltage signal of the heated oxygen sensor changes. Long-term fuel regulation is roughly adjusted to maintain an air-fuel ratio of 1.

Hello, dear; The reason why the 10-year Buick Yinglang fuel correction system is too thin is 1The air-fuel ratio sensor has a faulty poor cavity. This means that the air-fuel ratio is relatively low, which is caused by the inaccurate fuel injection.

The main reason for inaccurate fuel injection is damage to the air flow sensor and oxygen sensor. Solution: You need to check the data flow of the air-fuel ratio sensor to check whether the engine intake pipe is leaking.

2.It may be caused by the poor quality of gasoline. Workaround:

Just change the gasoline. 3.It may be that the engine's air intake system is faulty, causing the mixture to be too thin.

Solution: It is recommended to check whether the air flow meter of the engine intake system is normal. The Engine Control Module (ECM) controls the air fuel metering system to provide the best combination of power performance, fuel economy and emissions control.

If the heated oxygen sensor shows a dilute state, the fuel adjustment value should be higher than 10%. If the heated oxygen sensor shows an over-concentrated state, the fuel adjustment value should be less than 10%. The short-term fuel regulation value changes rapidly as the voltage signal of the heated oxygen sensor changes.

Long-term fuel regulation is roughly adjusted to maintain an air-fuel ratio of 1.

Kiss; Buick Yinglang XT: It is the first five-door coupe launched by Buick, which integrates the best dynamic state sports genes that Buick can give to the mid-level car, it has a forward-looking trend and a positive sports style, innovative and leading power technology and excellent product quality, bringing a dynamic and extraordinary, enjoyable driving experience to the new generation of young and repentant light cutting-edge, stimulating their inspiration and motivation for self-innovation, reflecting their eclectic and trendy attitude towards life.