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What to Do When Car AC Has Normal High Pressure but High Low Pressure?

1 Answers
ArianaLynn
07/30/25 6:28am
The issue is likely caused by a damaged or faulty air conditioning expansion valve in the AC components, and it needs to be repaired at a 4S shop. Here is relevant information: 1. Precautions for removal: Removing the AC expansion valve is very troublesome. After repair or replacement, it is necessary to check whether the compressor refrigerant is insufficient. When replacing the AC expansion valve, there will be some leakage of the compressor refrigerant. If not checked in time, it may affect the compressor's operation. 2. Car air conditioning: The air conditioning device used in motor vehicles is the car's AC, which can adjust the temperature inside the vehicle cabin to a suitable state, providing a comfortable environment for passengers, reducing travel fatigue, and creating good working conditions for the driver.
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How to Remove the Rear Seat of a Passat?

Passat rear seat removal steps are as follows: 1. First, lift the front part of the rear seat slightly. 2. Then push it backward until you hear a click sound. Steps to remove the backrest of the Passat are as follows: 1. There are three fixing screws at the bottom of the backrest, located near both sides and the middle. 2. Use tools to remove the locking screws, being careful not to remove the safety wire screws. After removing the screws, pull the backrest upward with force. Below is additional information: 1. The Passat interior maintains the Volkswagen style, with the air vents adopting a through-type design. The panoramic sunroof is the same as that on the Phideon, and the 8-way electrically adjustable perforated leather seats come with heating, ventilation, and massage functions. 2. In terms of assistance systems, it is equipped with adaptive headlights, blind spot monitoring, adaptive cruise control, lane keeping system, emergency rear braking, preventive occupant protection system, AEB brake assist, panoramic imaging, and MKE intelligent fatigue monitoring system.
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Is it serious if the SVS light comes on in a diesel vehicle?

When the SVS light comes on in a diesel vehicle, it indicates that there is a problem with the engine, and it needs to be inspected and repaired at a 4S shop. Below is more information about the SVS indicator light: 1. How it works: When the ignition key is turned on, this light will illuminate and will turn off after the vehicle is started. When the engine ECU detects a fault, the SVS light will also come on. If this light comes on while the vehicle is in motion, it means there is a problem with the vehicle's engine. 2. The function of the SVS warning light: The SVS warning light is a fault indicator that alerts the owner when the ECU or TCU of an electronically fuel-injected vehicle detects an issue with the engine or automatic transmission. Whenever this light comes on, it is recommended that the owner take the vehicle to a repair shop for inspection as soon as possible.
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Does an Electronic Steering Gear Need to Be Replaced If It Gets Water Inside?

If a small amount of water enters the electronic steering gear, replacement is not necessary. You can turn the steering wheel to full lock several times, and the water will be expelled with the oil. However, if too much water enters, the electronic steering gear will need to be replaced. Below is more information about steering gears: 1. Classification: Steering gears are mainly divided into rack-and-pinion steering and worm-and-roller steering. Based on the energy transmission medium, power steering gears can be either pneumatic or hydraulic. Pneumatic power steering gears are not suitable for heavy-duty trucks because the working pressure of pneumatic systems is relatively low (generally no higher than 0.7MPa), making the components excessively large when used in heavy vehicles. Hydraulic power steering gears, on the other hand, can operate at pressures exceeding 10MPa, resulting in much smaller component sizes. 2. Working Principle: In vehicles equipped with power steering systems, the steering gear uses external energy to supplement the physical effort required from the driver, making steering easier and more convenient during driving.
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What is automotive power steering fluid?

Automotive power steering fluid, also known as steering assist fluid or power steering oil, is a specialized lubricant used in power steering systems to assist with steering. In English, it is referred to as Power-Steering-Fluid. This hydraulic fluid is specifically designed for power steering pumps and works through hydraulic pressure to make steering lighter or electronically adjust the damping of the steering fluid. It shares similarities with automatic transmission fluid and brake fluid. More details are as follows: 1. Power steering is a comfort-enhancing technology in vehicles that provides assistance during steering, reducing the physical effort required from the driver. The power steering fluid serves as a medium within this system, transmitting steering force and providing cushioning. 2. Different vehicle models require different types of power steering fluid, so it's best to follow the specifications in the vehicle's manual. Additionally, automatic transmission fluid can sometimes be used as a substitute for power steering fluid. 3. When power steering fluid is used for an extended period without replacement, the steering wheel may become noticeably heavier under normal driving conditions, affecting the driving experience. For intense driving scenarios like racing, it's advisable to install a power steering fluid cooler, as overheating can reduce the system's assist function, compromising handling and potentially leading to hazardous situations.
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What are the symptoms of a faulty starter motor carbon brush?

The carbon brushes in the starter motor, if damaged, will cause the motor to either fail to rotate or lack sufficient power. Below is more information about the starter motor: 1. Composition of the starter motor: The automotive starter motor converts the electrical energy from the battery into mechanical energy, driving the engine flywheel to rotate and enabling the engine to start. Before the engine can operate under its own power, it must be rotated by an external force. The starter motor is the core component of the starting system, consisting of three main parts: a DC transmission motor, a transmission mechanism, and a control device. 2. Precautions for using the starter motor: In winter, starting difficulties are more common. When starting multiple times, each attempt should not last too long. Each use should not exceed 5 seconds, with an interval of 2-3 minutes between starts. After the vehicle has traveled 2,000 kilometers, check whether the fasteners are securely connected and whether the wire contacts are in good condition. After the vehicle has traveled 8,000 kilometers, inspect whether the commutator surface is smooth, whether the carbon brushes are stuck in their holders, and whether the carbon brush spring pressure is normal. If any faults are found, they should be repaired after disassembly.
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Which province does 'Yu' represent for vehicle license plates?

Yu is the abbreviation for Henan Province. All motor vehicle license plates in Henan Province start with the character 'Yu'. In China, the first Chinese character on a motor vehicle license plate represents the abbreviation of the provincial-level administrative region, with 'Yu' standing for Henan. The second letter indicates the code of the prefecture-level city where the vehicle is registered, where 'A' represents the provincial capital city, and other cities follow in sequential order. Additional information: 1. In China, automobile license plate numbers have a two-row structure: the upper row displays the motor vehicle registration authority code, while the lower row shows the license plate number. Motorcycle license plate numbers have a left-right structure: the left side displays the motor vehicle registration authority code, and the right side shows the license plate number. Large vehicles, small vehicles, motorcycles, and mopeds share the same license plate resource database and numbering sequence. 2. License plates in Henan Province include: YuA Zhengzhou, YuB Kaifeng, YuC Luoyang, YuD Pingdingshan, YuE Anyang, YuF Hebi, YuG Xinxiang, YuH Jiaozuo, YuJ Puyang, YuK Xuchang, YuL Luohe, YuM Sanmenxia, YuN Shangqiu, YuP Zhoukou, YuQ Zhumadian, YuR Nanyang, YuS Xinyang, YuU Jiyuan City (province-administered), YuV Zhengzhou supplement.
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