Why does the engine light stay on even though the car is running normally?

What do 92, 95, and 98 mean?

92, 95, and 98 represent these three grades of gasoline. 92-octane gasoline is suitable for vehicles with mature engine technology and no excessive fuel requirements; 95-octane gasoline is generally suitable for turbocharged and high-compression ratio vehicles, and it is compatible with the vast majority of models on the market; 98-octane gasoline is suitable for high-horsepower sports cars. The differences between 92, 95, and 98 gasoline: Different gasoline quality levels: The octane rating of gasoline represents the octane value of the fuel. A higher octane rating indicates a higher octane value, which means the gasoline has better anti-knock performance. This results in smoother engine operation, reduced wear and tear on the car, and better protection for the engine. Different fuel consumption: 98-octane gasoline has superior combustion value, allowing for more complete combustion and improved fuel efficiency, which helps reduce fuel consumption. Different environmental benefits: 98-octane gasoline is more environmentally friendly. It contains lower sulfur levels, reducing the likelihood of carbon deposits and resulting in relatively lower tailpipe emissions, making it more eco-friendly. It is recommended that vehicles designed for lower octane gasoline will not be damaged if higher octane gasoline is accidentally used. However, the increase in octane value may alter the fuel's ignition point, leading to delayed combustion in the engine. This can reduce the engine's power output and thermal efficiency, resulting in poorer performance. It is recommended that vehicles designed for higher octane gasoline should not use lower octane gasoline, as this can cause engine knocking. If the octane value is too low, the gasoline's ignition point decreases, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires, resistance will be encountered during the upward stroke. This resistance can make the engine run very unstably. Mild knocking may only increase noise without significant engine damage, but severe knocking indicates serious engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring. If you accidentally mix or add the wrong octane gasoline, simply refuel with the correct octane gasoline next time to restore normal operation. Some car owners believe that using higher octane gasoline can improve performance, but this is unnecessary. If the engine's compression ratio does not meet the required standard, even the best gasoline will not make a difference. At most, it may be slightly more environmentally friendly and cleaner.

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What is the Difference Between a Station Wagon and a Sedan?

Most station wagons are based on sedans, with the trunk raised to the same height as the roof to increase luggage space. In contrast, sedans have trunks that are lower than the roof. Station wagons are designed for long-distance travel, offering ample space to carry sufficient travel gear, while sedans have smaller storage capacity and interior space compared to station wagons. Below is relevant information: 1. Station Wagon: Station wagons are very popular in Europe, occupying an important position in the product lines of various European car brands. Examples include Audi's AVANT, Mercedes-Benz's Estate, BMW's WAGON, and Volvo's V series. In Europe, especially in the comfortable Nordic countries, Volvo station wagons are particularly popular and are the most commonly seen car brand in daily life, with almost every household owning a Volvo station wagon. 2. Sedan: Sedans feature a distinctively long hood and trunk in addition to the passenger compartment, making it easy to visually distinguish the engine compartment, passenger area, and luggage compartment (in some regions, this body style is referred to as a "three-box" design). The sedan's shape resembles ancient sedan chairs, with long handles at the front and rear of the passenger compartment, hence the name "sedan."

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How Long Does It Generally Take to Learn Subject 2?

Typically, Subject 2 requires 12-22 days of learning. During C1 and C2 driver's license training at a driving school, the theoretical study time for Subject 2 must reach 2 hours, and the practical training time must reach 22 hours before taking the exam. Below is relevant information: 1. Subject 2: Subject 2, also known as the small road test, is part of the motor vehicle driver's license assessment and refers to the field driving skills test. For small vehicles (C1 and C2), the test items include reverse parking, parallel parking, stopping and starting on a slope, etc. For large vehicles (A1, A2, A3, B1, and B2), the test items include stake test, stopping and starting on a slope, parallel parking, passing a single-plank bridge, curve driving, right-angle turning, etc. 2. Assessment Objectives: Subject 2 aims to ensure that learners master basic driving operation essentials and possess fundamental vehicle control abilities. It requires proficiency in basic methods of field and road driving, the ability to reasonably use vehicle controls and correctly manage the vehicle's spatial position, and the capability to accurately control the vehicle's position, speed, and route.

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What size photo is required for driver's license renewal?

For the 6-year renewal, a new photo is required. A recent one-inch, white-background, color, bareheaded photo must be used for driver's license renewal. If the photo is not qualified, a new qualified photo must be taken. The initial driver's license is valid for six years. After the motor vehicle driver's license is renewed, the original license becomes invalid and cannot be used again. It is necessary to properly keep the driver's information on the motor vehicle driver's license and not discard it casually, otherwise, information leakage may cause problems in the use of the motor vehicle driver's license. Renewal of the motor vehicle driver's license can be done through the mobile app Traffic Management 12123, or through the vehicle management department of the traffic management authorities or public security organs, effectively renewing the motor vehicle driver's license.

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Are Three or Four Drainage Grooves Better for Tires?

The water drainage grooves and the grip of tires are inherently contradictory. Therefore, mainstream tires on the market today typically feature either three or four drainage grooves to achieve a balance between grip and water drainage performance. Tires with three drainage grooves offer slightly weaker drainage performance but better grip. Conversely, tires with four drainage grooves provide superior drainage performance but slightly weaker grip. Below is some relevant information: 1. Principle of Tire Drainage: Tire drainage primarily relies on the tread patterns and grooves to expel water. The tread patterns channel water away, ensuring stable vehicle movement. 2. Grip: Grip refers to the maximum driving force provided by the road surface in the direction of travel. Essentially, it is the frictional force between the tire and the ground in the forward direction.

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Where is the Focus power steering pump fuse located?

Focus power steering pump fuse is located under the battery cover, you can see it by lifting the battery cover. The automotive power steering pump refers to a component that helps improve and stabilize vehicle performance, mainly assisting drivers in adjusting the vehicle's direction. Currently, most vehicles are equipped with power steering pumps, primarily including steering assist pumps and brake vacuum assist pumps. As Ford's best-selling compact car, the Focus has enhanced Ford's brand position in the global market with its excellent chassis and handling. The dimensions of the Focus are 4378mm in length, 1810mm in width, and 1468mm in height, with a wheelbase of 2705mm.

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Why does the engine light stay on even though the car is running normally?

What do 92, 95, and 98 mean?

What is the Difference Between a Station Wagon and a Sedan?

How Long Does It Generally Take to Learn Subject 2?

What size photo is required for driver's license renewal?

Are Three or Four Drainage Grooves Better for Tires?

Where is the Focus power steering pump fuse located?

What is the maximum cumulative driving time for a driver within 24 hours?

Is an ID card sufficient for Subject 1 test?

Will the RPM Increase When the Air Conditioning is Turned On?

When encountering what vehicles should motor vehicles yield the right of way?