Is it necessary to have a spare tire in a car?

Where is the oil pressure regulator located in the Audi Q7?

The fuel pressure regulator valve of the Audi Q7 is located inside the fuel filter, next to the right rear wheel. It is easier to find when the car is lifted. Working principle of the pressure regulator valve: The oil pressure is coordinated by the spring and the vacuum in the chamber. When the oil pressure exceeds the standard value, the high-pressure fuel will push the diaphragm upward, opening the ball valve, and the excess fuel will flow back to the fuel tank through the return pipe. Function of the pressure regulator valve: There is a diaphragm inside the pressure regulator, which controls the opening and closing of the pressure valve. When the oil pressure is below a certain value, the pressure valve closes, and the oil pump pressurizes to increase the pressure in the oil circuit. When the pressure exceeds the specified value, the diaphragm opens, and the over-pressurized fuel flows back to the fuel tank through the return pipe, serving as a pressure relief function.

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What to Do When the Vehicle Stability System Fails?

Here are the solutions for vehicle stability system failures: 1. Actuator stuck: The throttle actuator is stuck in the closed position. The ECM commands the throttle to open, but the actuator is stuck. If the electronic throttle fuse is fine and the wiring harness is intact, check pins 1 and 2 for the throttle motor coil. Replace the throttle if the resistance is abnormal. 2. Electronic control system failure: It is recommended to visit a repair shop to read the fault codes with a decoder and then proceed with repairs. 3. EPS system failure: The ESP system consists of a control unit and components such as the steering sensor (monitoring the steering angle of the wheel), wheel sensors (monitoring the speed of each wheel), yaw rate sensor (monitoring the vehicle's rotation around the vertical axis), and lateral acceleration sensor (monitoring centrifugal force during turns). In case of failure, it is advisable to seek repairs at a professional repair shop.

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Can You Make a U-Turn on a Single Dotted Line Plus a Solid Line?

It depends on the situation: If your lane has a dotted line and the opposite lane has a solid line, you can make a U-turn. However, if your lane has a solid line and the opposite lane has a dotted line, you cannot make a U-turn. According to Article 90 of the Road Traffic Safety Law, violating the prohibition markings will result in a fine of 200 yuan and 3 demerit points. Generally, on long roads, white solid lines are usually found in the middle section or before intersections. If there are yellow dotted lines or white dotted lines, U-turns are allowed, but U-turns are prohibited on solid lines. Cases where U-turns are allowed: Intersections with U-turn signs: If there is a clear U-turn sign at the intersection, you can make a U-turn. If there is a U-turn traffic light, you must follow its instructions. If there is no traffic light, you should make a U-turn based on the specific situation, ensuring it does not hinder other vehicles or pedestrians. Intersections without explicit no U-turn or no left-turn signs: If there is no explicit prohibition against U-turns, you can make a U-turn. "No explicit prohibition" means the intersection does not have signs like "No U-Turn," "No Left Turn," or a solid center line. In such cases, you can safely make a U-turn. Yellow grid lines also allow U-turns: Yellow grid lines are no-parking zones typically marked at intersections prone to congestion due to temporary parking, important entrances, or other necessary locations. Parking on these grid lines (including waiting at traffic lights) is a violation. Although vehicles cannot stop in yellow grid zones, U-turns are permitted there. As long as there is no central barrier, yellow grid lines are equivalent to "U-turn allowed." Intersections with U-turn traffic lights: This is straightforward—if there is a U-turn traffic light, you must wait for the green light to make a U-turn. When no left-turn and U-turn allowed signs appear together: U-turns are allowed, but left turns are prohibited. However, "No U-Turn" does not mean "No Left Turn." Things to note when making a U-turn at an intersection: Observe the road markings. If they are solid lines, U-turns are prohibited under any circumstances. You should continue driving to find a suitable spot for a U-turn. If there is a "No Left Turn" sign ahead, even if there is no explicit "No U-Turn" sign, U-turns are not allowed at that intersection because U-turns and left turns are similar maneuvers, and a U-turn requires a left turn first. U-turns must be made from the innermost left-turn lane. If you are in the second left-turn lane, you cannot make a U-turn at that intersection. Always yield to oncoming traffic when making a U-turn. Only proceed if it does not interfere with the normal flow of traffic; otherwise, you will bear full responsibility for any accidents. Near the intersection stop line, lanes usually have guiding arrows for vehicle direction. The leftmost lane is not always for left turns only. If a lane has a straight arrow, even without explicit "No U-Turn" signs, U-turns are not allowed. U-turns cannot be made on pedestrian crosswalks, as this is also a violation.

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Why does the engine belt stop squeaking when water is poured on it?

Introduction to the reason why the engine belt stops squeaking when water is poured on it: Pouring water can soften the belt and enhance friction. However, the squeaking problem will persist after the water evaporates. Instead of water, a polyol solution should be used to maintain the belt's flexibility for a longer time. Introduction to solutions for engine belt squeaking: 1. Apply polyol solution to the belt: The polyol solution can effectively reduce the hardening of the belt and maintain its elasticity, thereby solving the problem of insufficient friction; 2. Adjust the tensioner pulley: The tensioner pulley is responsible for keeping the gear and belt in close contact. Tightening the tensioner pulley can effectively increase the belt's friction, making various squeaking noises disappear automatically; 3. Replace the belt: When the belt shows signs of aging, it should be replaced promptly. An aged belt can cause slipping, affecting the vehicle's normal operation.

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Why are the turn signals on a Geely not working?

There are many possible reasons why a car's turn signals may not be working, including open circuits, faulty flasher relays, excessive contact gap, and other factors. Checking the coil: Open the flasher relay cover and inspect whether the coil and resistor are intact. If the resistor is heating up but the contacts fail to close, press the movable contact. If the turn signals light up at this point, it indicates a relay malfunction. Adjust if the contact gap is too large. Faulty turn signal switch: If the turn signals still don't light up when pressing the movable contact and the contacts are closed, use a screwdriver to bridge the contacts. If the lights then work, it suggests oxidized contacts. If the turn signals remain off, the issue may lie with the turn signal switch. Use a screwdriver to connect the switch's power line to the left and right light terminal posts separately. If the lights illuminate, this confirms a faulty turn signal switch that requires removal, repair, or replacement.

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What is the normal water temperature for a Volkswagen car?

The normal temperature gauge reading for a Volkswagen car is 90 degrees. Water temperature introduction: Water temperature refers to the temperature of the antifreeze. In addition to being filled with oil passages, the engine interior is also crisscrossed with antifreeze channels. The full name of antifreeze is antifreeze coolant. Functions of antifreeze: Its important roles are cooling and reducing engine temperature, while also preventing freezing in winter. When the water temperature reaches 90 degrees, it indicates that the engine's working temperature has stabilized. Both excessively high and low water temperatures can easily damage the engine. Too low a temperature is unfavorable for engine lubrication, while too high a temperature may cause engine self-ignition. During daily driving, pay attention to the water temperature indicator on the dashboard. If the red light comes on, do not continue driving. It is recommended that the owner pull over to let the engine cool down.

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Is it necessary to have a spare tire in a car?

Where is the oil pressure regulator located in the Audi Q7?

What to Do When the Vehicle Stability System Fails?

Can You Make a U-Turn on a Single Dotted Line Plus a Solid Line?

Why does the engine belt stop squeaking when water is poured on it?

Why are the turn signals on a Geely not working?

What is the normal water temperature for a Volkswagen car?

What Causes the Headlights to Suddenly Turn On After the Car Has Been Parked for Several Days?

What is the weight of the Mercedes-Benz EQC?

Does the transfer of a used car count as an annual inspection?

What Causes the Noise from the Corolla's Belt Tensioner Pulley?