What's wrong with the engine fault light when the car starts?
What's wrong with the engine fault light when the car starts? Although the automobile market is developing faster and faster, there are more and more corresponding automobile failures. As the heart of a car, engine failure is a problem that must be solved. Engine fault light is a problem that every partner can't ignore, which is directly related to engine life and safe driving. The engine fault light is on, which is usually caused by the following reasons.
Description: the quality of gasoline is poor and not up to standard.
It is estimated that most of the small partners basically have this experience. Not long after the car refueled, the engine fault light on the dashboard of the car came on. This is mostly due to the poor quality of gasoline added by non-standard gas stations, which affects the insufficient combustion of oil-gas mixture when the engine is working, and the engine fault light is on. This will not affect safe driving, but it will hurt the engine more or less.
Introduction: oxygen sensor failure
Nowadays, cars are equipped with two oxygen sensors, one in front of the three-way catalyst and the other behind the three-way catalyst. The function of the front oxygen sensor is to check the air-fuel ratio of the engine under different working conditions. The ECU computer adjusts the fuel injection quantity according to this signal and calculates the ignition time. The key is to check the working condition of three-way catalytic converter! Therefore, if the oxygen sensor is damaged or the sensor plug is damaged or lifted, it will affect the lean or rich mixture, thus causing the fault light to light up.
In fact, the oxygen sensor is a very durable component. As long as the fuel quality is qualified, it can be used for 3 years or even longer. So the fault light of the new car is on, so check whether the oxygen sensor plug is lifted.
Introduction: air flow sensor failure.
Air flow sensor is also called air flow meter. It checks the intake air flow, converts it into an electrical signal, and then transmits it to the electronic control unit. ECU indirectly determines how much fuel to inject according to the optimal air-fuel ratio. If the air flow sensor or circuit fails, the ECU will not be able to obtain a good intake signal and adjust the normal fuel quantity, resulting in the mixture being too thin or too rich, and the engine will not work normally.
Although the failure of the air flow sensor will not cause the engine to fail to start, it is very likely that there will be unstable idle speed, poor acceleration, backfire of the intake pipe and black smoke from the exhaust pipe.
Introduction: carbon deposit in spark plug
The quality of fuel in the market is uneven. Using spark plugs in congested cities is easy to cause carbon deposition, which will affect the engine's poor work, such as difficult starting, unstable idle speed, poor acceleration, quick refueling, quick tempering, excessive exhaust and increased fuel consumption.
Introduction: Engine knock
When the engine inhales the air-fuel mixture, the ignition of the air-fuel mixture will be affected by factors other than various adjustments before reaching the expected ignition position in the compression stroke. At this time, the huge impact force produced by combustion is opposite to the direction of piston movement, causing engine vibration, which is called knocking. The symptoms are that the car can't run, the engine noise is too loud, and in severe cases it is accompanied by knocking on the cylinder.
Introduction: The water temperature sensor is damaged.
There is a thermistor inside the water temperature sensor. The lower the temperature, the higher the resistance. The higher the temperature, the lower the resistance. When the engine water temperature is low, the water temperature information sent to ECU by the water temperature sensor of the water thermometer will make the air-fuel ratio rich and make the engine work stably. If there is no cold information from the water temperature sensor at this time, the air-fuel ratio will be diluted, which will affect the abnormal rotation of the engine. Similarly, if a cold message is sent after warm-up, the air-fuel ratio will become rich and the engine may not work normally.
Description: Engine cylinder is missing.
Obviously, the lack of engine cylinder will affect the fuel consumption of the car, emit black smoke, accelerate weakly, shake violently, the engine noise increases, and it is easy to stall. The key of engine cylinder shortage comes from ignition system and oil supply system, including carbon deposition in spark plug and damage of high pressure oil pump.
When the car starts, the engine fault light comes on. Basically, it is necessary to use a computer checker for diagnosis. If it is a false fault code, it can be cleared directly. If there is a fault, it should be checked and repaired according to the fault code. If only the engine fault light is on, the car is driving normally and there is no obvious abnormality, you can continue driving and go to the 4S shop for inspection when you have time; If the water temperature is too high or the oil pressure warning light is on, you can obviously feel that there is a fault, or get off the bus and call for help.
Open and close the power bottle, Deco or valta?
Valta starts and stops the battery with 70 amps, which is about 1000 yuan. If the price is too cheap, you need to be vigilant and distinguish the authenticity of the product.
Compared with valta, the warranty period of DECO brand bottle for valta AGM battery and DECO AGM battery is as long as 24 months. But on the whole, the quality of valta will be better.
Valta AGM battery, also known as start-stop bottle, has three times the cycle life of ordinary battery. Specially designed for cars equipped with advanced start-stop system, it has stronger charge-discharge cycle ability and can provide electric energy under long-term idle condition. It also has the characteristics of longer service life, lower corrosiveness and lower maintenance cost.
The anode and cathode of valta AGM battery adopt Beveria patented grid design, which has the characteristics of energy saving and environmental protection, and is suitable for cars equipped with start-stop system.
Deagm battery adopts advanced slab continuous casting technology and multi-element alloy formula to improve the corrosion resistance of grid. Advanced valve control design is adopted to make the generated gas react with oxygen-containing compounds, which can reduce the consumption of battery water and make it safer and more reliable to use. In order to improve the battery's charge acceptance and high current discharge ability, a special new negative electrode additive was adopted. Advanced anode formula and high temperature curing process are adopted to improve the deep cycle life of the battery. What's wrong with the engine fault light when the car starts? Which is better to start and stop the power bottle of Deco or valta @20 19?