What to Do If You Successfully Booked the Theory Test (Subject 1) but Didn't Pay or Attend?

Why doesn't the hood pop open when released?

Lock tooth spring lacks lubrication, just add a little lubricating oil. Introduction to the engine hood: The engine hood (also known as the bonnet) is the most prominent body component and one of the parts that car buyers frequently inspect. The main requirements for an engine hood are heat and sound insulation, lightweight construction, and high rigidity. Principle of the engine hood: When opening, the engine hood usually flips backward, though a small portion flip forward. A backward-flipping hood should open to a predetermined angle without contacting the windshield, maintaining a minimum gap of about 10 millimeters. To prevent accidental opening during driving due to vibration, the front end of the engine hood is equipped with a safety lock hook mechanism. The lock release switch is located under the dashboard inside the cabin. When the doors are locked, the engine hood should also be simultaneously locked.

19

2

Share

Can the Replaced Three-Way Catalytic Converter Be Sold for Money?

Car replaced three-way catalytic converters can be sold for money because they contain rare precious metals. Lifespan of the Three-Way Catalytic Converter: The service life of a three-way catalytic converter ranges between 80,000 to 100,000 kilometers. The specific lifespan depends on the vehicle's usage conditions, and it is also related to the quality of fuel used and the driving environment. Composition of the Three-Way Catalytic Converter: A three-way catalytic converter generally consists of four parts: the shell, vibration damping layer, substrate, and catalyst coating. The shell is made of stainless steel to prevent oxide scale from falling off, which could block the substrate. The vibration damping layer is composed of gaskets or wire mesh pads, serving to seal, insulate, and secure the substrate. To protect the substrate from damage caused by vibration, thermal deformation, and other factors, the gasket is made of expanded mica and aluminum silicate fibers, bonded with adhesive. The substrate is made of honeycomb-shaped ceramic materials, though many are also made of metal (including stainless steel) materials. The catalyst consists of precious metals such as platinum, rhodium, and palladium, sprayed onto the substrate to form the purifying agent.

20

2

Share

What is the vehicle used for tourism called?

Tourism vehicles are mainly divided into three types: urban tourism vehicles, mountain tourism vehicles, and VIP tourism vehicles. Introduction to tourism vehicles: Tourism vehicles use batteries as their power source, making them environmentally friendly and pollution-free, effectively utilizing resources. They feature a personalized control system, flexible steering, comfortable handling, light and smooth operation, simple driving, reusable electric power, long lifespan, and other advantages. Tourism vehicles are widely used in hotels, scenic spots, real estate viewing vehicles, factories, airports, train stations, bus stations, docks, stadiums, parks, and other locations. Operation method of tourism vehicles: Most tourism vehicles adopt a battery-powered driving method, which does not emit harmful gases that pollute the atmosphere. They only need to be charged to operate. Since power plants are mostly built far from densely populated cities, they cause less harm to humans. Moreover, power plants are stationary and centralized in their emissions, making it easier to remove various harmful emissions, and related technologies are already available. The battery power for tourism vehicles can be obtained from sources such as coal, nuclear energy, and hydroelectric power. Tourism vehicles can make full use of surplus electricity during off-peak nighttime hours for charging, allowing power generation equipment to be utilized around the clock, greatly improving economic efficiency, and contributing to energy conservation and reducing carbon dioxide emissions. The disadvantage of tourism vehicles is their weaker climbing ability.

9

2

Share

What Causes the Mercedes Engine Malfunction Light to Illuminate?

Sensor issues, vehicle maintenance problems, fuel quality issues, poor combustion of the air-fuel mixture, engine intake problems, turbocharging issues, exhaust system problems, and anti-theft system malfunctions are the main reasons that cause the engine malfunction light to illuminate. Additionally, during vehicle startup, the car performs a self-check on the engine system. Normally, the engine malfunction light will turn off after the self-check is completed. If it remains illuminated for an extended period, it is advisable to promptly visit a repair station for professional assistance to diagnose and eliminate potential safety hazards. Below is a detailed explanation of each type of fault: Sensor Issues: Sensors include coolant temperature, crankshaft position, air flow, intake temperature, oxygen sensors, etc. When these sensors are damaged, have poor connections, or experience signal interruptions, the vehicle's ECU cannot accurately obtain engine data, which will trigger the engine malfunction light. In such cases, it is essential to seek professional inspection at a repair center to promptly address safety risks. Maintenance Issues: Poor engine maintenance is the most common cause of the engine malfunction light illuminating. Vehicles have specific maintenance schedules, and failure to adhere to these schedules, combined with poor driving habits, can increase the operational burden on the engine, eventually causing the engine malfunction light to alert the owner of a fault. Fuel Quality Issues: This refers to both fuel and engine oil. The fuel used in cars typically has a specific grade, while engine oil can be semi-synthetic or fully synthetic. Manufacturers usually recommend the type of fuel and engine oil to use. If the owner fails to follow these recommendations, prolonged use can lead to engine wear, triggering the malfunction light. Always use the recommended fuel grade and appropriate engine oil for the vehicle. Poor Combustion of Air-Fuel Mixture: Faulty spark plugs, ignition coils, fuel pumps, or clogged fuel lines can cause poor combustion of the air-fuel mixture in the engine. This leads to engine carbon buildup or knocking issues, which are detected by the engine's oxygen sensors and reported to the ECU, resulting in the malfunction light illuminating as a warning. Intake Issues: The engine requires air for combustion, and the air filter plays a crucial role in this process. If the car's air filter is dirty or not cleaned regularly, it can affect the engine's air intake, potentially leading to blockages over time. In severe cases, this can cause the engine malfunction light to illuminate. Turbocharging Issues: Problems with the intake turbocharging system or turbocharger can also cause the engine malfunction light to illuminate. The most common issue is a damaged turbocharger, accompanied by symptoms such as oil leaks, excessive oil consumption, reduced power, metallic noises, or blue/black smoke from the exhaust. Exhaust System Issues: The rear oxygen sensor, catalytic converter, exhaust camshaft, and bearings can cause the engine malfunction light to illuminate. The most frequent issue is a faulty catalytic converter. Factors such as using leaded gasoline, lead- or silicon-based oil additives, physical damage to the catalytic converter, or fuel system malfunctions can easily lead to catalytic converter failure. Anti-Theft System: If the car's electronic anti-theft system malfunctions or the anti-theft controller is incompatible with the engine's electronic controller, the anti-theft system can prevent the engine from operating normally, while also causing the engine malfunction light to illuminate. Solutions for the Engine Malfunction Light: If the engine malfunction light is on and the car cannot start, this may be due to a faulty fuel pump or ignition components. It is recommended to call for assistance immediately. If the engine malfunction light is on and the vehicle can still be driven but exhibits severe shaking or loss of power, pull over safely and call for roadside assistance. If the engine malfunction light is on but the vehicle operates normally, this may indicate a faulty sensor. In this case, driving can continue temporarily, but it is best to drive at low to moderate speeds and visit a repair shop as soon as possible to diagnose and eliminate potential safety hazards.

11

2

Share

How to Confirm Your Signature for Subject Three Driving Test?

During working hours on the test day, promptly return to the examination site and seek out staff members. Inquire with the test safety officer or other staff members, explain your situation to them, and reconfirm the signature. If you haven't signed, promptly proceed with a supplementary signature.

19

4

Share

How to Check Driver's License Online?

Log in to the official website of the local traffic police department, then click on the driver's information query. After opening the page, enter your ID number and file number as prompted, then click confirm. After confirmation, all information about the driver's license will be displayed, including the date of issuance, annual review date, and points status.

7

3

Share

What to Do If You Successfully Booked the Theory Test (Subject 1) but Didn't Pay or Attend?

Why doesn't the hood pop open when released?

Can the Replaced Three-Way Catalytic Converter Be Sold for Money?

What is the vehicle used for tourism called?

What Causes the Mercedes Engine Malfunction Light to Illuminate?

How to Confirm Your Signature for Subject Three Driving Test?

How to Check Driver's License Online?

Can vehicle inspections be conducted nationwide?

Where to Renew Driver's License in Xincai?

What is the function of the L gear in an automatic transmission?

What are the measures to prevent driver fatigue?