How to Reset the Tire Pressure on Volkswagen T-Roc?

Reasons for Electric Power Steering Repair Faults in Skoda Octavia?

Cars with electric power steering system failures should find a safe place to park and wait for assistance. The main faults in the Skoda Octavia's electric power steering system include the following: (1) Causes of Heavy Steering Fault: 1. The power steering system contains a large amount of air, causing abnormal steering; 2. Foreign objects in the steering hydraulic lines cause the steering pump flow control valve to stick; 3. Loose connections in the power steering system lead to steering fluid leakage; 4. Excessive wear of the steering gear piston cylinder, poor oil seal sealing, or control valve sticking or damage. (2) Causes of Steering Noise Fault: 1. Overloading of the steering system causes excessive wear of the stator and rotor inside the steering pump, leading to irregular movement of the oil in the pump and generating noise; 2. Loose installation of the steering gear or steering pump on the bracket, internal wear of the steering gear, or improper adjustment of gears and racks; (3) Causes of Steering System Oil Leakage Fault: Generally, the steering pump does not leak oil unless it is damaged. However, it is still necessary to inspect the connecting parts and joints in the power system and steering system for any leaks.

7

4

Share

If I don't want the license plate number selected on 12123, can I choose one at the DMV?

If you don't want the license plate number selected on 12123, you can choose one from 50 options at the DMV. First, check whether you have confirmed your selection. If you selected a number but didn't confirm it, you can go to the DMV to choose a number on-site without any negative consequences. However, if you have already confirmed your selection, it is generally not possible to cancel it. The only option is to wait until the 15-day validity period of the license plate expires, and then bring the required vehicle documents to the DMV to select a new number and register. Please note that if you successfully select a number online but then abandon it, you will be blacklisted by the DMV and will not be able to use online selection services for the next two years. Important notes for new vehicle number selection: When selecting a number, you must carefully enter the Vehicle Identification Number (VIN) and personal information as required by the system. The information entered must exactly match the registration information at the DMV; otherwise, the pre-selected license plate number will be canceled. After successful selection, the license plate number will be reserved for 15 working days starting from the second day. During this period, you cannot use the internet to select another number or modify the submitted information. If registration is not completed within the deadline, the pre-selected license plate number will be canceled, and the user will be blacklisted and unable to use online selection services for two years.

2

5

Share

Volkswagen Lavida Dual Clutch Transmission Failure Issues?

Volkswagen Lavida Transmission Failure, Gear Shifting Jerk While Driving: The repair process for the seven-speed dry dual-clutch transmission OAM installed in the Volkswagen Lavida revealed gear shifting jerk during driving. This phenomenon occurs under normal driving conditions and may be caused by transmission failure. 2. Volkswagen Lavida Transmission Failure Analysis and Repair Process: Initial inspection by the repair technician found no fault codes. The gear shifting jerk issue in the Lavida is a common symptom when faults occur in the clutch or the mechatronic unit. Therefore, the transmission was removed for a comprehensive inspection. After removal, the technician discovered excessive clutch clearance and severe wear, as well as significant wear in the electromagnetic valves and valve channels within the mechatronic unit. After repairing the mechatronic unit and replacing it with new components, the gear shifting jerk issue in the Volkswagen Lavida was resolved. The process involved disconnecting transmission-related parts, lifting the vehicle, and using a hoist to remove the engine and transmission, preparing to take out the dual-clutch transmission. Detailed inspection of the Lavida's transmission mechatronic unit revealed severe wear in the electromagnetic valves and valve channels, directly related to long-term failure to replace the transmission fluid. The primary function of the mechatronic unit is to control the transmission's hydraulic pressure for gear shifting. When the mechatronic unit fails, the vehicle may experience symptoms such as a flashing wrench light and poor gear shifting. The main causes of mechatronic unit failure are degraded or insufficient transmission fluid.

18

2

Share

What is the solution for fogging on the front windshield on rainy days?

Press the defogging button, turn on the air conditioning (A/C) switch, set the temperature to the lowest, and turn on the external circulation to defog. Both cold and warm air can be used to defog the car windshield, but warm air is slower than cold air. The most effective method is to use cold air, which blows dry cold air directly onto the glass, preventing water vapor from condensing on the surface and achieving defogging. The method for using warm air to defog is the same as using cold air, but it's important to note that warm air should not be used for defogging on rainy days as it may initially worsen the fogging. Always use external circulation when defogging the car windshield. The reason for fogging on car windows: There is a temperature difference between the inside and outside of the car. If the temperatures inside and outside are different, the surface with the lower temperature will have a lower saturated vapor pressure than the surrounding environment, causing water vapor to gather on the glass surface and form tiny droplets, resulting in fogging. Methods to defog car windows: Air Conditioning Cooling: Use the air conditioning's cooling and dehumidifying function to reduce air humidity and remove fog. In summer, especially when multiple people enter the car, if the air conditioning is not turned on promptly, the high humidity from exhaled breath can quickly cause fogging on the front windshield. In this case, turn on the air conditioning to blow cold air toward the front windshield, using its dehumidifying function to quickly remove the fog. If the humidity is too high and the air conditioning is not effective enough, slightly open a window to rapidly reduce the humidity inside the cabin. Combining this with the air conditioning can yield faster results. Air Conditioning Warm Air: Use warm air to reduce the temperature difference and remove fog. In winter, blowing warm air onto the glass quickly raises the temperature of the front windshield, reducing the temperature difference between the inner and outer surfaces and preventing excessive fogging. However, note that the rear and side windows heat up more slowly, so it takes longer to completely remove the fog. Whether using automatic or manual air conditioning, turning it on helps with dehumidification. Avoid setting the temperature to the coldest position, as prolonged use may cause fogging on the outer surface of the windshield. Applying Anti-Fog Spray: Spray a small amount of defogging agent on the car windows and wipe it clean to remove dirt and stains. While polishing the glass, a thin transparent protective film forms, effectively preventing water vapor from condensing and fogging the glass. This is especially useful in cold winters. Alternatives to anti-fog spray include dish soap, soapy water, glycerin, alcohol, or saline solution. After applying, let it dry and then wipe off excess residue with a chamois or soft dry cloth. This can keep the windows fog-free for several days. Opening Windows for Airflow: If the fog inside the car is not too heavy, opening the side windows can create airflow between the inside and outside, reducing the temperature difference and gradually dissipating the fog. The principle is the same as using cold air from the air conditioning. However, this method has obvious drawbacks and cannot be used during rain, snow, on highways, or when the fog is heavy. Rear Windshield Heating: Most cars have a rear windshield heating function, though the button location may vary. Turning on the heating switch will remove fog from the rear windshield in about a minute.

16

0

Share

Does crossing the stop line during a yellow light count as running a red light?

According to the "Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China," vehicles that have already crossed the stop line when the yellow light is flashing at an intersection may continue to proceed. If the yellow light is already on and you continue to force your way through, being caught by the camera will still count as running a red light. According to the relevant provisions in the "Procedures for Handling Road Traffic Violations," motor vehicle drivers who violate traffic signal lights at intersections will be penalized with 6 demerit points. Additionally, in accordance with the relevant provisions of the "Road Traffic Safety Law," a fine may also be imposed. Criteria for determining running a red light: Electronic eyes capture three photos as the basis for determining a red-light violation: the front wheels crossing the stop line, the rear wheels crossing the stop line, and the front wheels crossing the opposite stop line. Only when all three photos are present will it be considered running a red light. When the red light is on, if you cross the stop line but manage to stop the vehicle even if you have already crossed the line, it will not be considered running a red light. However, it will be considered stopping beyond the line, which, according to traffic laws, is categorized as failing to drive or stop as required at intersections, resulting in a penalty of 3 demerit points. How to avoid running a red light while driving: Follow the arrow signal if there is one; otherwise, follow the circular light. When the red light is on, the front of the vehicle must not cross the stop line. When the yellow light is on, the front of the vehicle must not cross the stop line. When the green light just starts flashing, if you are close and moving fast, you should proceed because you might not be able to stop in time and could cross the stop line. If you are far away, moving slowly, or the intersection is congested, you should stop. When driving in the city, develop the habit of looking for traffic lights whenever you see a crosswalk or stop line and approach an intersection.

10

1

Share

What to Do When the Passat Shift Lock Magnet Shorts to Positive?

If the Passat shift lock solenoid shorts to positive, you need to check the two wires of the solenoid—one power wire and one control wire—to see if there are any issues. If the wiring tests normal, the shift solenoid needs to be replaced. The left end of the shift valve is connected to the shift solenoid via an oil passage. When the solenoid is closed, there is no oil pressure acting on the left end of the shift valve, and the shift valve moves to the left under the force of the spring on the right end. When the solenoid is open, the main oil pressure acts on the left end of the shift valve through the solenoid, causing the shift valve to overcome the spring force and move to the right, thereby changing the oil passage and achieving the shift. The working principle of the car shift solenoid: 1. Car Solenoid Valve: Principle: When energized, the electromagnetic coil generates a magnetic force that lifts the closing member from the valve seat, opening the valve. When de-energized, the magnetic force disappears, and the spring presses the closing member against the valve seat, closing the valve. 2. Distributed Direct-Acting Solenoid Valve: Principle: It combines direct-acting and pilot principles. When there is no pressure difference between the inlet and outlet, energizing the solenoid directly lifts the pilot valve and the main valve closing member in sequence, opening the valve. When the inlet and outlet reach the starting pressure difference, energizing the solenoid first activates the pilot valve, increasing the pressure in the lower chamber of the main valve and decreasing the pressure in the upper chamber, thus using the pressure difference to push the main valve open. When de-energized, the pilot valve uses spring force or medium pressure to push the closing member downward, closing the valve. 3. Direct-Acting Solenoid Valve: Principle: When energized, the electromagnetic coil generates a magnetic force that lifts the closing member from the valve seat, opening the valve. When de-energized, the magnetic force disappears, and the spring presses the closing member against the valve seat, closing the valve. 4. Distributed Direct-Acting Solenoid Valve: Principle: It combines direct-acting and pilot principles. When there is no pressure difference between the inlet and outlet, energizing the solenoid directly lifts the pilot valve and the main valve closing member in sequence, opening the valve. When the inlet and outlet reach the starting pressure difference, energizing the solenoid first activates the pilot valve, increasing the pressure in the lower chamber of the main valve and decreasing the pressure in the upper chamber, thus using the pressure difference to push the main valve open. When de-energized, the pilot valve uses spring force or medium pressure to push the closing member downward, closing the valve. 5. Pilot-Operated Solenoid Valve: Principle: When energized, the magnetic force opens the pilot hole, rapidly reducing the pressure in the upper chamber, creating a high-low pressure difference around the closing member. The fluid pressure pushes the closing member upward, opening the valve. When de-energized, the spring force closes the pilot hole, and the inlet pressure rapidly forms a low-high pressure difference around the closing member via the bypass hole, pushing the closing member downward and closing the valve. 6. Pilot-Operated Solenoid Valve: Principle: When energized, the magnetic force opens the pilot hole, rapidly reducing the pressure in the upper chamber, creating a high-low pressure difference around the closing member. The fluid pressure pushes the closing member upward, opening the valve. When de-energized, the spring force closes the pilot hole, and the inlet pressure rapidly forms a low-high pressure difference around the closing member via the bypass hole, pushing the closing member downward and closing the valve.

5

2

Share

How to Reset the Tire Pressure on Volkswagen T-Roc?

Reasons for Electric Power Steering Repair Faults in Skoda Octavia?

If I don't want the license plate number selected on 12123, can I choose one at the DMV?

Volkswagen Lavida Dual Clutch Transmission Failure Issues?

What is the solution for fogging on the front windshield on rainy days?

Does crossing the stop line during a yellow light count as running a red light?

What to Do When the Passat Shift Lock Magnet Shorts to Positive?

How is the quality of the 4th generation Santa Fe's engine and transmission?

What Does Motorcycle Subject Two Test Cover?

How long is the validity period of a temporary license plate generally?

What are the precautions for driving in rain and snow?