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How to Determine the National Emission Standard from the Vehicle License?

1 Answers
OLondon
07/30/25 12:37am
Methods to check the national emission standard from the vehicle license: Directly check the vehicle model on the license. 'Y' indicates the National IV emission standard, and 'V' indicates the National V emission standard. However, after testing by most people, it has been confirmed that this method is not applicable to all vehicle models. Other methods to check the emission standard: 1. Vehicle's environmental protection label: The simplest and most direct method is to look at the vehicle's environmental protection label, which has clear markings on the back. 2. Factory certificate: If it's a new car, you can check the vehicle's factory certificate or vehicle conformity certificate. 3. Query platform: You can also log in to the public query platform of the Motor Vehicle Environmental Protection Website, enter the vehicle's VIN (Vehicle Identification Number) and the last 6 digits of the engine number to query the vehicle information.
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What Causes the Clicking Sound When Braking in an Automatic Transmission Car?

Automatic transmission cars may produce abnormal sounds when braking due to normal ABS activation or electronic linkage. Here are the detailed explanations: Normal ABS Activation: The ABS operation is actually a cyclic process of locking and releasing the brakes, keeping the vehicle in a state of near-lock intermittent rolling. When you brake hard and trigger the ABS, it may produce a clicking sound, which is normal. In this case, simply press the brake pedal firmly to the floor. Clicking Sound from the Gear When Braking in an Automatic Transmission Car: If you hear a clicking sound between the transmission and the gear lever when pressing the brake pedal, the main cause may be the electronic linkage between the braking system and the automatic transmission. When the brake is pressed, the transmission solenoid valve activates, producing a clicking sound. This serves as a safety reminder, as you need to press the gear lever lock button to shift gears.
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What are the reasons for a sudden increase in car fuel consumption?

Reasons for a sudden increase in car fuel consumption: 1. Oxygen sensor malfunction: If the increase in fuel consumption is not caused by poor driving habits, it is advisable to check whether the car's oxygen sensor is damaged or malfunctioning. In case of a fault, the oxygen sensor fails to function properly, leading to incorrect feedback on the car's exhaust emissions. For example, incomplete fuel combustion or insufficient power output may cause the car's computer to collect erroneous data, resulting in an increase in fuel injection and progressively higher fuel consumption over time. If the oxygen sensor is faulty, it can be cleaned or replaced with a new one. 2. Spark plug malfunction: Under normal circumstances, the fuel consumption of a regular SUV is around 10 liters per 100 kilometers. If it suddenly increases, check whether the spark plugs are malfunctioning. Carbon deposits on the spark plugs can cause weak ignition or delayed ignition, leading to increased fuel injection and higher fuel consumption. 3. Charcoal canister malfunction: Another possibility is that the car's charcoal canister solenoid valve is malfunctioning. It is recommended to take the car to a 4S shop for inspection and replace the charcoal canister. Doing so should resolve the issue of high fuel consumption.
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What to Do When the Seat Belt Gets Stuck and Won't Pull Out?

If the seat belt gets stuck, you can try gently retracting and extending it to restore normal function. Seat belts often get stuck due to improper use, which can cause deformation and lead to jamming at the entry and exit points. Below are some relevant details: 1. Definition of a seat belt: A seat belt is a safety device used in equipment, such as aircraft or during high-altitude work and performances, to ensure safety. It is primarily made of polyester, polypropylene, or nylon. A seat belt is not just a strap; it includes other assembled components besides the webbing. 2. Application of seat belts: Seat belts have become a primary consideration for drivers and passengers and are one of the most important safety features in a car. Traditional safety components, such as rearview mirrors, side mirrors (traditional rearview systems), seat belts, AIRBAG (airbags), and ABS (anti-lock braking systems), are widely recognized by drivers and passengers and are commonly used in imported luxury vehicles. 3. Hazards of improper seat belt use: In the event of an accident, if the seat belt is too loose, the consequences may include the passenger slipping out from under the belt or the belt failing to tighten in time due to excessive slack. This means the belt cannot absorb part of the impact force as intended, leaving the entire burden to the airbag.
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Is Wheel Balancing Necessary After Rotating Front and Rear Tires?

Wheel balancing is absolutely necessary after rotating front and rear tires on a vehicle. If the car doesn't pull to one side while driving and the steering wheel remains straight, wheel alignment isn't required. However, wheel balancing is mandatory; otherwise, vibration may occur during driving. Below are relevant details: 1. Recommended to perform at 4S shops: There are many factors causing abnormal tire wear, and rotation methods differ for front-wheel drive, rear-wheel drive, and all-wheel drive vehicles. It's advised to have tire rotation performed at authorized 4S shops after testing, rather than doing it yourself. 2. Precautions for tire rotation: Generally, tires with symmetrical tread patterns can be swapped left-right or front-rear. However, asymmetrical or directional tread tires can only be rotated front-rear. 3. Balancing is mandatory after rotation: Wheel balancing must be performed every time tires are rotated. Only balanced tires should be remounted. Since front and rear tire pressures differ, adjusted pressures should be reset to standard levels with TPMS recalibration. 4. Rotation methods: For front-wheel drive vehicles, move front tires straight back and cross rear tires to the front. For rear-wheel or all-wheel drive vehicles, move rear tires straight forward and cross front tires to the rear.
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How much oil is there from the upper limit to the lower limit on a car's dipstick?

The oil level from the upper limit to the lower limit on a car's dipstick is generally 1.5L of engine oil. The function of the dipstick is not only to check the level of engine lubricating oil. Experienced drivers or repair personnel can detect many engine working conditions by inspecting the dipstick. Proper use of the dipstick plays a crucial role in extending the engine's service life. Usage method: Locate the position of the oil dipstick, which is usually near the engine with a pull ring. Pull out the dipstick when the vehicle is cool. After the first removal, wipe it clean with a clean tissue, then reinsert it. Upon the second removal, check the oil level on the dipstick. If the oil level is between the upper and lower limits, it indicates the oil quantity is normal. Effects of insufficient oil: Too little engine oil will increase engine wear. If the engine lacks oil for a long time, it will suffer severe erosion and eventually burn out, leading to abnormal engine operation. When the oil in the engine oil pan is insufficient, the contact areas such as bearings and journals will have poor lubrication due to the lack of oil, accelerating wear and even causing failures like bearing seizure or journal burning.
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How to Force Release the Electronic Parking Brake?

Owners can simply try fastening the seatbelt inside the car, starting the ignition, shifting to D gear, and lightly pressing the accelerator pedal, and the electronic parking brake will automatically release. Due to the convenience of electronic parking brakes, many car models now use them to replace traditional mechanical handbrakes. Besides automatically releasing when driving, they can also automatically engage after the owner parks, turns off the engine, and unfastens the seatbelt. Below is some relevant information: 1. Definition of the electronic parking brake: The electronic parking brake is a technology that achieves parking braking through electronic control. Its working principle is the same as that of the mechanical handbrake, both achieving parking braking through the friction generated between the brake disc and brake pads, except that the control method has changed from the previous mechanical handbrake lever to an electronic button. 2. Technology of the electronic parking brake: The electronic parking brake is also known as the electronic parking brake system. The electronic parking brake system (EPB) integrates the temporary braking function during driving with the long-term braking function after parking and achieves parking braking through electronic control. 3. Function of the auto-hold feature: The electronic parking brake extends from the basic parking function to the auto-hold feature AUTO-HOLD. The application of the AUTO-HOLD auto-hold feature technology allows drivers to avoid prolonged braking when the vehicle is stopped. When the automatic electronic parking brake is activated, unnecessary sliding of the vehicle can be prevented.
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