Dongfeng Xiaokang 465 engine failure light does not light up, what is the problem that the car does

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.

Turn on the key fault light is not on, indicating that there is a problem with the computer version of the power supply system, it will definitely not be on the car, there is a big wire plug under the passenger seat, and it loves oxidation and corrosion, there is a computer power supply line in it, check it and try it! I've had many cases.

If you can't hit the car, you generally see that there is oil, electricity, timing, and cylinder pressure will lead to not getting on the car, and you need to find a maintenance unit to check it well.

Hello, can you clarify the specific fault of your story? Do you mean that if the engine fault indicator does not light up when it is turned on, you will not look for the car, and if the indicator light is on when the key is turned on, you can get on the car?

Hello, it is recommended to check whether the oil circuit, gasoline pump is working. Hope mine is helpful to you.

Good morning! Check whether the computer version of the insurance is burned, if it is not burned, check the line of the insurance to the computer version, and the engine failure light is not lit because the computer version is not powered.

This one still needs to check whether there is oil, and it can't be played without oil.

The car computer did not participate in the work, look at the wiring, the main relay, the fuse.

Check the crankshaft position sensor.

Hello, first check the fuse.

Check the fuel pressure.

Have any other questions?

Summary. Hello dear <>

Dongfeng Xiaokang 465 engine fault light does not light up, the reason for the problem that the vehicle cannot start is: 1Circuit Issues:

It may be that there is a fault in the circuit, including loose circuit interface, corrosion, short circuit of the circuit, etc., resulting in the vehicle not being able to start normally. 2.Engine Failure:

If the inspection does not find a circuit fault, it may be that the engine itself has failed, and it is necessary to check whether the engine has ignition, fuel, oxygen supply and other faults. 3.Throttle Problems:

A car engine needs air, fuel, and sparks to start, and if you find that air can't get in or the speed of the air coming in is limited, the car can't start<>

Dongfeng Xiaokang 465 engine failure light does not light up, what is the problem that the car does not catch fire

Hello <>

Dongfeng Xiaokang 465 engine fault light does not light up, the reason for the problem that the vehicle cannot start is: 1Circuit Issues:

It may be that there is a fault in the circuit, including loose circuit interface, corrosion, short circuit of the circuit, etc., resulting in the vehicle not being able to start normally. 2.Engine Failure:

If the inspection does not find that the crack branch calls the circuit and the front obstacle is erected, it may be that the engine itself has failed, and it is necessary to check whether the engine has ignition, fuel, oxygen supply and other faults. 3.Throttle Problems:

A car engine needs air, fuel, and sparks to start, and if you find that air can't get in or the speed of the air coming in is limited, the car can't start<>

<> based on the teacher's personal experience, it is caused by a circuit problem, so you can check the <>< first

1. The quality of automobile fuel is unqualified.

If the engine fault light on the dashboard of the car is lit shortly after the vehicle is refueled, then it is generally because the oil is not filled correctly, the quality is poor, and it is not up to standard, which leads to hair.

When the engine is working, the oil-gas mixture is not fully burned. This may not affect driving safety, but it will cause some damage to the engine. Mold dust.

2. Oxygen sensor failure.

At present, there are generally two oxygen sensors installed on the car, one before and after the three-way catalytic converter, which is used to detect the air-fuel ratio of the engine under different working conditions, and at the same time, the front is to provide a signal for the ECU driving computer to adjust the amount of fuel injection and calculate the ignition time. The latter is used to test the working quality of the three-way catalytic converter. If one of them has a problem selling the code source, or the plug is damaged or loose, it will cause the mixture to be too thin or too thick, and the engine failure light will also be on.

3. The air flow sensor is faulty.

If the air flow sensor is not working properly, the ECU will not get the correct air intake signal, and the problem will be similar to the above, and the engine will not run properly.

4. Carbon deposition in spark plugs.

Carbon deposits in the spark plug will cause abnormal phenomena such as difficulty in starting, unstable idling, excessive exhaust gas, and increased fuel consumption, and the engine fault light will also be on.

5. Engine knocking.

If there is a knock in the vehicle, the vehicle will be weak and noisy, and in severe cases, there will be a sound of cylinder knocking. At this time, the vehicle's engine fault light will also turn on.

6. The water temperature sensor is damaged.

If the water temperature sensor is damaged, the air-fuel ratio will become thinner or thicker, which will cause the engine to work abnormally and cause the engine failure light to turn on.

7. The engine lacks cylinders.

After the engine lacks cylinders, the vehicle will have large fuel consumption, black smoke, weak car acceleration, serious shaking, and increased engine noise.

1. Check the status of the car engine in time.

2. Check the status of the sensors, air flow sensors, and spark plug parts of the car.

3. Check whether the car has knocking.

4. Check whether the ignition coil is faulty.

5. Start and stop the vehicle, and observe whether the fault light is still on when the vehicle is started after starting the vehicle three times.

6. Go to the repair shop for maintenance in time and resume normal use.

There are two reasons why the engine does not catch fire when it lights up:

1. The engine cannot rotate or rotates too slowly due to the obstacle of the starting system, which may be caused by insufficient battery storage, loose electrode pile clamp or serious oxidation of electrode pile, circuit fuse failure, ignition switch failure, starter failure, starting line open circuit or poor contact of line connector.

2. The ignition system failure may be caused by the poor working of the ignition coil, resulting in weak or no high-voltage sparks, ignition failure, and incorrect ignition time.

Summary. If this happens, then you definitely need to check whether the power supply on your ignition coil is normal, generally because the power supply of the ignition coil is abnormal, there will be no ignition, only fuel injection. So this requires you to measure the plug on the ignition coil first, there will be a 12 volt power supply on this plug, and there will be a negative pole of the pulse signal, if there is no power supply, check the fuse and circuit of the power supply.

If you don't have pulses, consider the crankshaft position sensor, as well as the ignition chip inside your engine computer.

Hello, don't worry, I can ask for your question, but wait a minute, I need text for about 2 minutes.

If this happens, then you must first check whether the power supply on your ignition coil is normal, generally because the power supply of the ignition coil is abnormal, there will be no ignition, only the world has fuel injection. So this requires you to measure the plug on the ignition coil first, there will be a 12 volt power supply on this plug, and there will be a negative pole of the pulse signal, if there is no power supply, check the fuse and circuit of the power supply. If you don't have a pulse, you should consider the reed shaft position sensor and the ignition chip inside your engine computer.

Ask about custom messages].

The steering wheel is not in a deadbolt state. The solution is simple, as long as you hit the steering wheel hard and twist the key at the same time, you can generally unlock the steering wheel lock quickly, and the ignition is an instantaneous thing.

Did you not return the gear to P when you parked? Think about it, if the D or R gear can be ignited, the jump of the vehicle at the moment of ignition is undoubtedly a huge safety hazard. Therefore, for automatic transmission vehicles (AT, CVT, AMT), manufacturers will preset this mode, and repeatedly inform in the manual:

Make sure the gear is in the P position when ignition.

The key is in the car, but the instrument always shows 'key matching error', which is likely to be the power loss of the smart key, and the starting system cannot sense the weak radio waves emitted by the key. Therefore, it is recommended to pick up the smart key and put it on the start button, and then press the button to start.

Check if the battery has power. If the ignition is not ignited, it may be due to the loss of power or the expiration of the battery life due to the long-term headlights have not been turned off, and the battery is generally replaced in time according to the maintenance manual.

See if there's oil. If the fuel gauge shows that it is below the red line, it will not ignite. At the same time, pay attention to the quality of the oil. There have been car owners who found that there was water and mud in the fuel tank after disassembling the car, and with such oil, it is impossible for the car not to break.

Some car owners add water or inferior antifreeze to the car without antifreeze, which leads to the particularly cold situation in winter, causing the entire waterway to be frozen, and the engine to be frozen and cracked, resulting in the car water pump not working, unable to ignite, and injuring other parts of the engine.

It can only be solved by instrument diagnosis.

1) The engine cannot be started due to a failure of the starting system or it turns too slowly so that the engine cannot start

1) The battery has insufficient power storage, the electrode pile clamp is loose or the electrode pile is seriously oxidized;

2) The main fuse of the circuit is broken;

3) Ignition switch failure;

4) Starter failure;

5) The starting line is broken or the line connector is in poor contact.

Generally, this fault is a problem of the circuit and oil circuit, which needs to be solved by the elimination method.

1. Suggestion: Check the carbon canister and solenoid valve.

2. Suggestion: The computer retrieves the fault code, checks the engine control unit, engine data flow, fuel adjustment value, and oxygen sensor value. Data from major sensors such as the intake manifold absolute pressure sensor and the throttle position sensor (TPS).

Check the exhaust manifold and three-way catalytic converter. The engine is high-voltage and the spark plug is normal, which can basically rule out the possibility of failure of the ignition system. If the air intake, exhaust, and ignition are normal, you can check the crankshaft pulley again.

It is estimated that there is a high possibility of oil circuit problems, and the oil pressure, pressure holding state, and fuel injection pulse width of the fuel system are tested. It's really not good, oil change pump assembly, carbon canister.

3. Nozzle cleaning, throttle body cleaning.

4. Idle motor, generally 4S has equipment to detect idle motor, generally the motor starts without a problem, the vibration will be very slight, and when the oil or loose oil is given, it will shrink up and down and reflect more quickly. On the contrary, it may not work (generally friends who always clean the motor by themselves do not turn the front of the motor, if you find that the motor column can be rotated, it may be broken.) ）

Hello, you see if it's a problem with the gasoline pump, it is estimated that there is a small blockage, the problem of the bullet speed is not ruled out, a little blockage, you clean the fuel injector. There is also a situation where the spark plug has too much carbon deposit, which affects the ignition efficiency.

Please check the following: It may be a problem with the gasoline pump, the oil pressure is not enough due to the heating of the oil pump, please check.

Check to see if the gasoline filter is too dirty. Clean the fuel injector, if the gas is used for a long time, the fuel injector may have carbon deposits and poor fuel injection. If there is a problem with the oil, clean the tank and change the spark plug.

I don't know what model you are, please use the diagnostic instrument detection system first, and report the fault code If the relationship between CKP and CMP is misaligned, then it should be the inaccurate phase of the valve valve caused by the formal misalignment, and it will also cause the ignition time to be inaccurate and cause the engine to shake, and it is necessary to install the timing belt from the new and align the corresponding position of the crankshaft and camshaft.