Why doesn't the car move when shifted into D gear without pressing the accelerator?

What are the uses of the car OBD interface?

OBD is the abbreviation of On-Board Diagnostic, which translates to "On-Board Diagnostic System". This system continuously monitors the operating conditions of the engine and the working status of the exhaust after-treatment system. Once it detects a situation that may cause excessive emissions, it will immediately issue a warning. The car's OBD interface mainly has four functions: 1. Display of onboard computer data: The OBD interface can provide various operational data of the vehicle, such as data displayed on the vehicle dashboard, various fuel consumption records, battery voltage, air-fuel ratio, throttle opening, knock count, etc.; 2. Reading fault codes: The OBD interface can be used to read fault codes, which helps in quickly diagnosing vehicle faults and reducing the time for manual diagnosis; 3. Changing codes to achieve more functions: By connecting the data line of the OBD interface to the vehicle's CAN bus and adjusting the codes of various modules, many different "hidden" functions can be achieved, enabling "additional configurations"; 4. Reading and flashing ECU/TCU programs: This facilitates manufacturers in updating the control programs of the ECU at any time, but it is not recommended to modify them yourself.

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What does the tire code 225/65r17 102h mean?

The tire code 225/65r17 102h represents the following specifications: 1. 225 indicates the tire width of 225mm; 2. 65 represents the aspect ratio of 65%; 3. R stands for radial tire construction; 4. 17 denotes the rim diameter of 17 inches; 5. 102 is the load index; 6. H indicates the speed rating. The international standard tire specification generally consists of six components: "tire width (mm) + aspect ratio (%) + tire type code + rim diameter (inches) + load index + speed rating code". Below are the meanings of each part of the tire specification: 1. Tire width: This is a factor affecting the vehicle's fuel consumption performance. 2. Aspect ratio: This is the main factor influencing the vehicle's responsiveness to road conditions, calculated as the percentage of tire height to width. 3. Tire type code: Common codes include "X" for high-pressure tires, "R" and "Z" for radial tires, and "-" for low-pressure tires. 4. Load index: This represents the maximum load capacity of a tire in coded form, indicating its load-bearing capability. 5. Speed rating: This indicates the maximum speed limit for the tire, exceeding which may cause a blowout.

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Is the Highway Free on Mid-Autumn Festival?

Highway tolls are not waived during the Mid-Autumn Festival; normal charges apply. Below is relevant information regarding highway toll policies during holidays: 1. According to the "Implementation Plan for Exempting Small Passenger Vehicles from Toll Fees on Major Holidays," highway toll exemptions apply during four national statutory holidays: Spring Festival, Qingming Festival, Labor Day, and National Day, as well as any consecutive holidays officially designated by the State Council. 2. The 2020 Mid-Autumn Festival was exceptional because the 15th day of the eighth lunar month coincided with October 1st on the Gregorian calendar, overlapping with National Day. Consequently, the 2020 Mid-Autumn Festival and National Day shared an 8-day holiday period, during which highway tolls were waived.

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What Causes Gear Shift Jerkiness?

When a car experiences jerkiness during gear shifts, it is usually due to the following reasons: 1. The transmission fluid needs to be replaced. Transmission fluid, also known as gear oil, loses its lubricating effectiveness over time if not replaced promptly, significantly increasing shift resistance. 2. Cold gear shifting. In cold temperatures, the viscosity of the transmission fluid may not reach its optimal state, resulting in poor lubrication and causing jerkiness during shifts. 3. Rusty transmission bearings. This prevents the clutch driven plate from moving smoothly, leading to poor return and difficulty in engaging gears. 4. Clutch control system malfunction. This results in insufficient clutch disengagement travel, causing incomplete clutch separation and difficulty in gear engagement. 5. Deformation of the clutch pressure plate assembly's drive plate, leading to poor separation.

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What is the specific process of four-wheel alignment?

The specific process of four-wheel alignment can be roughly divided into 6 steps, as follows: adjust the rear wheels first → then adjust the front wheels → for the rear wheels, adjust the camber angle first and then the toe angle → for the front wheels, adjust the caster angle first → then adjust the wheel camber angle → finally adjust the toe angle. The standard procedure for four-wheel alignment: 1. Symptom inquiry and test drive: Carefully listen to and record the driver's description of the vehicle's discomfort symptoms, and conduct a test drive if necessary. 2. Inspection and maintenance of the steering and suspension system: Before performing four-wheel alignment, all steering and suspension systems should be inspected. 3. Pre-alignment work for deviation faults: If the main fault described by the driver is vehicle deviation, it should first be determined whether this deviation is caused by side slip before alignment.

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How is car polishing done?

Car polishing is performed as follows: 1. Adjust the polishing machine to the appropriate speed, fully moisten the sponge wheel with water, and then shake off excess water. 2. Apply a small amount of polishing compound to the car's paint surface (treat one small section at a time, avoiding large-area application), starting from the roof. 3. The polishing machine's sponge wheel should maintain tangential contact with the paint surface with moderate pressure and consistent speed. 4. Follow a systematic sequence during polishing; do not proceed randomly. After using the polishing compound, switch to a glazing compound and repeat the above steps (when changing compounds, replace the sponge wheel as well—do not mix sponge wheels).

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Why doesn't the car move when shifted into D gear without pressing the accelerator?

What are the uses of the car OBD interface?

What does the tire code 225/65r17 102h mean?

Is the Highway Free on Mid-Autumn Festival?

What Causes Gear Shift Jerkiness?

What is the specific process of four-wheel alignment?

How is car polishing done?

Can the car still run without coolant?

What buttons are there inside the Changan Uni-T car?

What is the vehicle registration certificate?

Does an Expired Temporary License Plate Affect Vehicle Registration?