What is Rollback?

Does the headlight replaced at a 4S store come with a warranty?

Headlights replaced at a 4S store come with a warranty. Below are the relevant details: Introduction to Vehicle Warranty: A vehicle warranty means that various components will be replaced free of charge if they are confirmed to be damaged due to quality issues rather than human factors, such as problems with the speedometer or air conditioning. The warranty period or mileage for the vehicle is based on the data publicly announced by the manufacturer. Generally, it is two years or 60,000 kilometers, though some manufacturers may offer warranty mechanisms that exceed these terms. Introduction to Car Lights: Car headlights, also known as car front lights or car LED daytime running lights, serve as the "eyes" of the vehicle. They not only affect the owner's external image but are also crucial for safe driving at night or in poor weather conditions. The use and maintenance of car lights should not be overlooked.

6

5

Share

What is the situation with the three lights of a traffic signal?

Here is the classification of traffic signals: 1. Red light signal: The red light signal is an absolute prohibition signal. When the red light is on, vehicles are prohibited from passing. Right-turning vehicles may pass if they do not hinder the passage of released vehicles and pedestrians. 2. Green light signal: The green light signal is a permission signal. When the green light is on, vehicles and pedestrians are allowed to pass, but turning vehicles must not hinder the passage of released straight-going vehicles and pedestrians. 3. Yellow light signal: When the yellow light is on, vehicles that have already crossed the stop line may continue to pass. The meaning of the yellow light signal is between the green light signal and the red light signal, having both a prohibition aspect and a permission aspect. When the yellow light is on, it warns drivers and pedestrians that the passage time has ended and will soon switch to a red light. Vehicles should stop behind the stop line, and pedestrians should not enter the crosswalk.

18

1

Share

Do I need to retake the test if the subject two results were not uploaded?

70/80-10 tires can be replaced with 90-10 vacuum tires. Here are the specific details about tires: 1. Introduction to tire pressure: Tire pressure, strictly speaking, refers to the air pressure inside the tire. In car maintenance, the engine is the heart of the car, and damage to the engine will lead to the end of the car's life. Similarly, tire pressure is the blood pressure of the car, and the level of tire pressure plays a crucial role in the performance and power of the car. 2. The importance of maintaining normal tire pressure: If the tire pressure is too high, the friction and adhesion of the tire will decrease, affecting braking performance; it can cause steering wheel vibration and deviation, reducing driving comfort; and it accelerates the wear of the central tread pattern, shortening the tire's lifespan. If the tire pressure is too low, the friction coefficient with the road surface increases, leading to higher fuel consumption.

11

1

Share

What is the reason for the continuous illumination of the urea fault light in a China V diesel vehicle?

Urea fault light illumination is generally caused by a nitrogen oxide sensor malfunction. For such faults, professional equipment is usually required for detection, and it is recommended to visit a service station for inspection and repair. Below are precautions for urea usage: 1. Regular inspection: Periodically check the urea solution level in the urea tank and replenish the urea solution in a timely manner. The consumption rate of automotive urea solution is 4%-6% of diesel consumption. Estimate the required urea solution based on the travel distance and carry sufficient barrel urea solution when necessary. 2. Prevent foreign matter from entering the urea solution: Automotive urea solution is alkaline and slightly corrosive. Avoid contact between urea solution and metals (except stainless steel), as these materials can react with trace amounts of ammonia in the urea solution to form compounds that affect SCR operation. When refilling automotive urea solution, use a dedicated urea solution filling pipe to prevent contamination by foreign matter.

7

1

Share

What Should Be Noted for China VI Vehicles?

China VI vehicles require attention to the following matters: 1. Use official fuel: Inferior diesel can cause incomplete combustion or excessive sulfur content leading to DPF poisoning, shortening the DPF regeneration cycle. In mild cases, it increases diesel consumption, while in severe cases, it can render the DPF useless. 2. Use official engine oil: Similarly, the ash content in engine oil directly affects DPF regeneration. Therefore, it is essential to use China VI-specific engine oil. Qualified engine oil not only ensures the proper functioning of the after-treatment system but also effectively extends maintenance intervals, thereby reducing the total lifecycle maintenance costs. 3. Urea solution is of utmost importance: Urea solution directly participates in the after-treatment process. If the urea solution does not meet standards, it can lead to excessive exhaust emissions, and the closed-loop control will directly restrict the engine's operating state. Additionally, non-compliant urea solutions can cause crystallization and blockages. Thus, using compliant urea solution is the most basic requirement in the China VI stage.

19

5

Share

Why can't the self-pickup at the driver's license service point be displayed?

It may be caused by network delay. You can explain the situation to the staff, as they have records. Below are some precautions regarding the driver's license: No driving on highways during the probationary period: From the day you obtain the driver's license, the first year is the probationary period. During this period, you are not allowed to drive on highways unless there is an experienced driver with at least 3 years of driving experience sitting in the passenger seat. C1 license penalty points: Drivers with a C1 license during the probationary period should be cautious. If 12 penalty points are accumulated, the probationary driving qualification will be immediately revoked. Large vehicle license penalty points: For large vehicle licenses above B class, if 6 to 12 penalty points (less than 12 points) are accumulated during the probationary period, the probationary period will be extended by one year. Within 30 days after the probationary period ends, you must take the subject one exam.

18

4

Share

What is Rollback?

Does the headlight replaced at a 4S store come with a warranty?

What is the situation with the three lights of a traffic signal?

Do I need to retake the test if the subject two results were not uploaded?

What is the reason for the continuous illumination of the urea fault light in a China V diesel vehicle?

What Should Be Noted for China VI Vehicles?

Why can't the self-pickup at the driver's license service point be displayed?

What is the reason for being unable to start after disassembling the battery?

What are the symptoms of a faulty brake booster?

What Causes Gear Shifting Jerkiness?

What are the dimensions of the Polo?