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What does it mean when the yellow P light is on?

1 Answers
DelCassandra
07/30/25 9:40am
When the yellow P light is illuminated, it indicates a fault in the parking brake or ABS system, requiring further inspection and confirmation. Additional details are as follows: 1. P light in the instrument cluster: Generally represents the vehicle's parking brake system, also known as the handbrake system. When the P light in the instrument cluster is illuminated, it can appear in three different colors. The meaning may vary slightly depending on the vehicle brand and the color of the P light. 2. Red P light illuminated: Indicates that the parking brake system is engaged, meaning the handbrake is pulled tight. This is indicated in red in the instrument cluster and is a normal state, not a fault. If it lights up or flashes along with other warning lights, such as the ABS system light, it indicates a system fault. 3. Green or blue P light illuminated: Indicates that the automatic parking (AUTO-HOLD) system is functioning normally. The P light will illuminate to alert the driver when the system is active.
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How many kilometers should the spark plugs of the Envision be replaced?

Envision spark plug replacement cycle: Under normal maintenance conditions, replace after driving 40,000 to 60,000 kilometers. However, due to differences in brands and engines, it may vary. It is recommended to follow the user manual. You can refer to the following standards for maintenance replacement: Platinum spark plugs should be replaced at 40,000 kilometers, ordinary nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000 to 80,000 kilometers. How spark plugs work: The spark plug's ground electrode is connected to the metal shell, which is threaded into the engine block via the cylinder head. The insulator mainly serves to isolate the metal shell and the central electrode. The terminal nut is the part of the spark plug that contacts the high-voltage coil. When current passes through the terminal nut and the central electrode, it ionizes the medium between the central electrode and the ground electrode to produce a spark, thereby igniting the air-fuel mixture in the cylinder.
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How Much Refrigerant Should Be Added to a Car Air Conditioner?

Generally, a car air conditioner requires 4 cans of refrigerant, but the actual amount is controlled based on the pressure gauge readings during operation. Below are the methods and timing for adding refrigerant to the air conditioner: Method for Adding Refrigerant to a Car Air Conditioner: Prepare qualified refrigerant charging tools, connect the car air conditioner to the charging tool adapter, evacuate the system, and inject liquid refrigerant from the high-pressure side to complete the refrigerant charging. During the process, constantly monitor the high and low pressures. Typically, the low pressure should be 150-250 Kpa, and the high pressure should be 1300-1500 Kpa. Specific values can be referenced in the user manual. Timing for Adding Refrigerant to a Car Air Conditioner: Normally, refrigerant should be added every 2-3 years. However, if the owner notices a decline in cooling performance or continuous bubbles in the sight glass of the air conditioner's tubing, refrigerant should be replenished.
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What Causes the Squeaking Noise from the Rear Wheels at Low Speed?

Reasons for squeaking noises from the rear wheels at low speed are as follows: Suspension Issues: If the car makes a squeaking noise at low speed, it is likely coming from the suspension. The car's suspension includes links, springs, shock absorbers, and stabilizer bars. If any of these components malfunction, such as loose bolts, it can cause noise due to shaking. Braking System Malfunction: If the noise increases when lightly pressing the brake, it is certain that the braking system has an issue. Problems like excessively thin brake pads, uneven wear between the brake disc and pads, or faults in the brake caliper, master cylinder, or wheel cylinder can cause noise in the braking system, typically manifesting as sharp and continuous sounds. Loose Engine Belt: If the engine belt is loose, it can also cause noise. You can try pinching the belt with your fingers and twisting it. Note that this operation should be performed when the engine is cool. The twist angle should generally be less than 90 degrees; otherwise, the belt tension needs to be adjusted.
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How to Use the Parking Brake Foot Pedal?

Use the parking brake when parking and the foot brake when decelerating. Below is relevant information about parking brake types: Function of the handbrake: When parking, it provides resistance to prevent the vehicle from rolling. The parking brake, also known as the handbrake or the parking gear in automatic transmissions, locks the drive shaft or rear wheels. The parking brake exerts much less force than the service brake, just enough to prevent rolling on slopes. It is generally used whenever parking is required. At red lights, you can also shift to neutral and engage the parking brake (handbrake). Classification of brakes: Currently, passenger vehicles feature three types of parking brake operation: handbrake, foot brake, and electronic parking brake. Foot-operated parking brakes, as the name suggests, are controlled by the foot and are commonly found in automatic transmission models. Traditional "handbrakes" are manually operated with a force of less than 200N (equivalent to 20 kgf), which can be unfriendly for many women with limited strength, often resulting in insufficient braking force and vehicle rollaway. Foot-operated parking brakes effectively address this issue.
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Is it mandatory to use 95-octane gasoline for the Jetta VS5?

The manufacturer of the Jetta VS5 specifies the use of 95-octane gasoline. Using 95-octane gasoline provides better protection for the Jetta VS5's engine. The type of gasoline to use should follow the manufacturer's requirements, and one should not blindly choose the gasoline grade based on the compression ratio alone. Relevant information about 95-octane gasoline is as follows: 1. 95-octane gasoline consists of 95% isooctane and 3% n-heptane. High-octane gasoline should be used when the engine has a high compression ratio. Using low-octane gasoline in a high-compression engine can lead to abnormal combustion, causing knocking, increased fuel consumption, and reduced driving power. 2. There is no fundamental difference in quality between 92-octane and 95-octane gasoline; neither has issues with fuel impurities. 92-octane gasoline contains 92% isooctane + 8% n-heptane, while 95-octane gasoline contains 95% isooctane + 5% n-heptane.
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What to Do When a Wrench Icon Appears on the Dashboard?

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