What is the cause of SAIC Maxus s engine fault light turning on the yellow light and not catching fi

1. The sensor is damaged, the contact is poor, or the signal is interrupted; 2. Poor engine maintenance; 3. The quality of fuel and oil is not good; 4. The combustion of the mixture is insufficient; 5. a spark plug.

malfunction, ignition coil failure; 6. The fuel pump is faulty and the oil circuit is blocked; 7. Blockage of air conditioner filter 1. Sensor problem; The sensors mentioned here include water temperature and crankshaft.

Position, air flow, intake air temperature, oxygen sensors, etc., when these sensors are damaged, poor contact or signal interruption, the ECU of the car cannot accurately obtain engine data, and the engine failure light will be on. 2. Maintenance problems; Poor engine maintenance is the most common cause of engine failure to light up. We know that the vehicle has a certain maintenance cycle, if the owner does not maintain on time, coupled with bad driving habits, then it will increase the burden of engine operation, and finally can only remind you through the fault light to care about your car 3, oil quality problems; The oil quality here includes fuel and engine oil, we know that the fuel filled by the car is generally marked, and the engine oil is also semi-synthetic and fully synthetic, the manufacturer will generally recommend the owner to use which grade of fuel, which type of engine oil, if the owner does not add as required, it will cause wear and tear of the engine in the long run, and the fault light is not to blame.

Poor combustion of the mixture; The failure of the spark plug, ignition coil, fuel pump, and oil circuit blockage of the engine will cause poor combustion of the engine mixture. Poor combustion of the mixture is caused by the problem of engine carbon deposition or knocking, and these will eventually be detected by the engine's oxygen sensor and reported to the ECU, which will naturally turn on the fault light to warn of the intake air intake problem; When the engine burns, it needs to take in the air, and in the process the air cleaner is required.

It is very important, if the air filter of the car is not clean, it will affect the air intake of the car if it is not cleaned regularly, and it will be blocked in the long run, and in serious cases, it will cause the engine failure light to turn on. pressurization issues; Intake booster lines, turbochargers.

It will also cause the engine failure light to illuminate. The most common of these is turbocharger damage, while the vehicle can also experience symptoms such as oil leakage, high oil consumption, loss of power, metal noise, and blue or black smoke from the exhaust pipe. 7. Exhaust problems; Rear oxygen sensor, three-way catalytic converter.

Exhaust camshafts and bearings.

The most common of these is a failure of the three-way catalytic converter that causes the engine failure light to illuminate. The use of leaded gasoline, the use of leaded or silicone lubricant additives, the bump of the three-way catalytic converter, and the failure of the engine oil supply system are some of the factors that can easily cause the failure of the three-way catalytic converter. anti-theft system; If the car's electronic immobilizer fails, or if the immobilizer does not match the engine electronic controller, the immobilizer system will also cause the engine to not work properly and the engine fault light will be lit at the same time.

SAIC Maxus engine light on yellow? 1. Carbon deposition on the top of the air inlet and piston will lead to poor atomization, which will cause insufficient combustion and cause the lamp to be on; 2. Cold start, especially when the weather temperature drops sharply, due to the computer temperature correction problem will cause insufficient light, but as long as the temperature drops to a certain temperature and does not fluctuate, the change will be relatively stable; 3. If the engine mileage is too long, the working characteristics of the spark plug will be weakened, which will cause the fault light to be on, so it is recommended to go to the maintenance shop for inspection.

Common faults and troubleshooting methods of automobile engines.

When the automobile engine is not working properly, and the self-diagnosis system does not have a fault code output, it is especially necessary to rely on the operator's inspection and judgment to determine the nature of the fault and the location of the fault. The author now summarizes the common faults of automobile engines as follows:

The engine does not start.

1) Fault phenomenon: turn on the ignition switch, turn the ignition switch to the starting position, and the engine cannot start.

2) Possible causes of failure:

a.The engine cannot rotate or rotates too slowly due to the failure of the starting system: the battery is not stored enough, the electrode pile clamp is loose or the electrode pile is seriously oxidized; The main fuse of the circuit is broken; Ignition switch failure; starter failure; The starting line is broken or the line connector is in poor contact.

b.Ignition system failure: The ignition coil works poorly, resulting in weak or no high-voltage sparks; ignition failure; The ignition time is incorrect.

c.Fuel injection system failure: There is no fuel in the tank; The fuel pump is not working or the pump oil pressure is too low; Fuel line leakage and deformation; The disconnect relay is disconnected; The fuel pressure regulator is not working well; The fuel filter is too dirty.

d.Air intake system failure: Failure of the idle control valve or its control line; Idle control valve air pipe rupture or joint leakage; The air flow meter is faulty. Fault.

If the general engine fault light is on, 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.

1. Too much carbon deposits inside the throttle or engine.

2. After the failure of the oxygen sensor, the mixture is out of balance. This phenomenon is easy to occur if you drive at low speeds in urban areas for a long time.

3. The phenomenon of leakage of the fuel injector leads to the fact that the fuel injector is still in the state of oil supply after the throttle is collected, resulting in the mixture being too thick when driving at low speed, resulting in unstable idle speed after the fuel injector. If it is severe, it will be turned off directly.

In this case, you need to use a computer to enter the system to read the fault.

1.Vehicle fault light is generally caused by the fuel emission system, you start and extinguish the vehicle when the fault light is on, start and extinguish the car three times after starting the vehicle and observe whether the fault light is still lit, or it is still lit You need to go to the store in time to check the fault code, to see whether it is an engine problem or sensor failure, or it may be an occasional failure can not be checked in time to the store.

2.When the computer receives the parameters of the oxygen sensor after the exhaust emissions seriously exceed the national legal standards, the internal program of the computer can not be corrected to the standard range, at this time, the engine control computer will send a warning light (yellow pollution light on) through the instrument to remind the owner to the maintenance station to check the cause of the engine pollution emission lamp.

There are many cases where the engine oxygen sensor is abnormal and causes the engine fault light to alarm. The engine oxygen sensor is generally placed near the intake manifold, due to intense driving or some collisions, the oxygen sensor will be displaced or damaged, which will cause the sensor to be abnormal and cause a fault light alarm.

Plugged injectors and carbon build-up in the intake valves can also trigger engine failure light alarms. Because there will be impurities in gasoline, they will accumulate at the fuel injector, which will affect the fuel injection of the fuel injector, especially in the cylinder direct injection engine, which will directly lead to engine shutdown and other conditions. The impurities will produce carbon deposits after combustion, and the accumulation of carbon on the throttle to a certain extent will affect the normal opening and closing of the throttle, affect the normal work of the engine, and cause the alarm light to light up.

Another common scenario is sensor failure. After walking on a muddy road, the engine fault light suddenly turned on, but there was nothing unusual about the car itself. When I drove the car to the 4S shop for inspection, it was found that the left front wheel sensor was faulty.

As a result, the problem was solved by slightly cleaning it with water and then installing it. An abnormal sensor does not necessarily mean that the vehicle is faulty, but there will certainly be an anomaly that needs attention.

First, use the computer to detect what the fault is, and see if there is oil or fire.

It may be out of gas or it may be out of oil, and you can't understand this car if you haven't driven it.

If it is an engine failure, the light is on and it cannot be started. The first thing we need to confirm is whether the starter responds? If the starter is responsive. At this time, we need to check the oil supply system. Ignition system. Is there a working power supply?

Possible causes of car engine failure lights on:

1, the vehicle fault light is generally caused by the fuel emission system, you start and extinguish the vehicle when the fault light is on, and after starting the vehicle three times, you observe whether the fault light is still lit, or it is still lit, you need to go to the store in time to check the fault code, to see whether it is an engine problem or a sensor failure, or it may be an occasional failure can not be checked in time.

2. When the computer receives the parameters of the oxygen sensor, the exhaust emissions seriously exceed the national legal standards, and the internal program of the computer cannot be corrected to the standard range, at this time, the engine control computer will issue a warning light (yellow pollution lamp on) through the instrument to remind the owner to the maintenance station to check the cause of the engine pollution emission lamp.

The automobile engine is the machine that provides power for the car, and it is the heart of the car, which affects the power, economy and environmental protection of the car. According to different power**, automobile engines can be divided into diesel engines, gasoline engines, electric vehicle motors, and hybrids.

Common gasoline engines and diesel engines belong to reciprocating piston internal combustion engines, which convert the chemical energy of fuel into mechanical energy of piston movement and output power to the outside world. The gasoline engine has high speed, small quality, low noise, easy starting, and low manufacturing cost; The diesel engine has a large compression ratio, high thermal efficiency, and better economic performance and emission performance than the gasoline engine.

In addition to the use of gasoline and diesel, vehicles that use other new energy sources are called new energy vehicles, including pure electric vehicles, hybrid electric vehicles, fuel cell vehicles, gas vehicles, bioethanol biodiesel vehicles, and hydrogen-powered vehicles. Most of the new energy vehicles on sale in the Chinese market are hybrid vehicles, but at present, pure electric vehicles have been taken as the main direction.

Hello, The engine fault light may not ignite due to poor gasoline quality, oxygen sensor failure, air flow sensor failure, spark plug carbon deposition or engine knocking.

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Hello, dear, there may be the following reasons: 1. Sensor problems. For example, water temperature sensors, air flow sensors, inlet air temperature sensors, oxygen sensors, etc., damage or poor contact will cause the engine failure light to turn on. 2. The inside of the engine cylinder is not clean, and there is carbon deposit.

The reason for this is generally because the fuel used is not of good quality and there are too many impurities. 3. The air filter element of the car is seriously blocked, which affects the air intake of the car, and if it is serious, it will cause the engine fault light to turn on. 4. Almost all electronic components on the car will turn on the engine fault light if they fail.

Hope it helps.

If the engine fault light is not lit, and it is accompanied by no ignition, you can check whether the engine control module is damaged? Or there is a problem with the power supply or hitching of the control module.

Hello, the current number of people consulted may not reply in a timely manner, if it is a vehicle failure problem, it is recommended to use the computer to detect the specific cause of the failure, search for "car master" can consult car problems at any time, 24 hours ** answer.

There are several reasons why the engine does not ignite:

1. The battery is insufficient, or there is no power, for the diagnosis of such faults that the engine cannot start, the battery should be tested first. It is necessary to find out whether the engine does not start because the battery is insufficient, and the battery needs to be charged if it is insufficient.

2. Engine starting system failure. 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.

In addition to this, of course, ignition switches, starter relays or solenoid coils.

There is also an on-board anti-theft system, which is also an important part of the starting system. Boot system damage needs to go to the 4s shop.

Repair. 3. Engine ignition system failure. In early ignition systems, the ignition coil could be easily removed.

An electrical spark detector is then used to detect whether the electrical spark is normal. Ignition system failures can be used to clean up deposits or replace spark plugs.

The above are the reasons why the engine does not catch fire, you can check them one by one.

After the vehicle is powered on, the built-in driving computer of the car will self-check the vehicle, if the vehicle is faulty, the corresponding fault light will be lit at the same time, so what is the reason why the engine fault light is not on fire?

1. The engine fault light of the vehicle is on, accompanied by the phenomenon that the vehicle cannot ignite, it may be that the ignition system of the car is faulty, such as the ignition coil of the vehicle falling off and breaking, which may cause the vehicle to fail to ignite, and it is necessary to go to the 4S shop in time to check the ignition system of the car.

2. If the age of the vehicle is too long, the gap of the spark plug is too large or the carbon deposit is too much, and the fault light of the engine will also be lit, and the spark plug of the car needs to be replaced if the vehicle cannot be started and cannot be ignited.

3. If the air flow meter of the car fails, the ECU will not be able to judge the correct air intake, and the normal fuel volume will not be controlled, which will lead to the abnormal concentration of the mixture, the vehicle will not catch fire, and the fault light of the engine will also be on, so the air flow meter of the car needs to be repaired in time.