What causes the engine fault warning light to illuminate?

What is the difference between 30 and 40 engine oil?

30 engine oil and 40 engine oil have the following differences: 1. 40 engine oil has higher viscosity than 30 engine oil. 2. 40 engine oil is suitable for higher maximum temperatures than 30 engine oil. 3. 30 engine oil has better fluidity than 40, which can reduce fuel consumption and dissipate heat from the engine faster. 4. 40 engine oil has better oil stability than 30 under extremely high-temperature conditions of the engine. Here is some relevant information about engine oil: 1. The grade after the oil classification indicates its viscosity specification. "W" stands for Winter, and the smaller the number before it, the better the low-temperature fluidity of the oil, indicating a lower usable environmental temperature and better engine protection during cold starts. 2. Oil classification uses a combination of two letters. The "S" series represents oil for gasoline engines, with general specifications ranging from SA to SN (in alphabetical order, but without SI). Each subsequent letter indicates better oil performance than the previous one, with more additives in the oil to protect the engine.

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Can a new car use the license plate from an old car?

It is possible to use the license plate from an old car on a new one, but there are conditions. The following are the conditions for using an old license plate on a new car: 1. The license plate must be registered under the same owner. This means the owner of both vehicles must be the same person. 2. The vehicles must be registered in the same location. In other words, the vehicles must be registered in the same region to be eligible for swapping. 3. The license plates must be of the same type. 4. The vehicles must be non-commercial. This means only private, household-use vehicles can swap license plates; commercial vehicles like taxis are not eligible. 5. After a license plate swap has been processed, you must wait one year before applying for another swap or to retain the original license plate number.

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Why does the car keep making noise after turning off the engine and opening the hood?

After driving, you may still hear sounds coming from the engine compartment after turning off the car, especially beeping noises. This phenomenon is normal and is caused by the thermal expansion and contraction of metal. Below are some relevant explanations for the continuous noise after turning off the engine and opening the hood: 1. Generally, there is no need to worry, especially if the sound is caused by metal contraction. 2. Another possibility is that the fan has not stopped rotating after the car is turned off, as it continues to cool the vehicle. 3. First, check if there are any hard objects placed in corners or storage compartments, as these may rattle when the car moves. 4. If these external factors are not the cause, please visit a 4S shop as soon as possible for a professional inspection by maintenance personnel.

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How Long is a Vehicle Inspection Valid After Expiration?

Vehicle annual inspections must be completed within 90 days before the inspection validity period indicated on the vehicle's driving license. If the inspection is overdue, the vehicle will not be allowed on the road. If caught by traffic police on-site or during an annual inspection, the penalty will be a 3-point deduction and a fine of 200 yuan. The following are issues that arise from not conducting an annual vehicle inspection: 1. Accidents involving vehicles with overdue inspections will not be covered by insurance. According to the 'Motor Vehicle Third Party Liability Insurance Clauses,' if an accident occurs while the insured vehicle has not undergone the required annual inspection, fails the inspection, or lacks other valid driving documents, the insurer will not be liable for compensation. 2. Vehicles without an annual inspection will be impounded and fined. For vehicles that have not undergone an annual inspection, traffic police can impose a fine of 200 yuan and a 3-point penalty under the 'Road Traffic Safety Law,' and the vehicle will also be temporarily impounded.

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What Does ECON Mean?

ECON refers to the energy-saving mode switch in cars, which can be used to turn the energy-saving mode on or off. Modern cars generally offer three driving modes to choose from: Eco Mode, Comfort Mode, and Sport Mode. Below is information about these three modes: Eco Mode: When the car is in this mode, fuel consumption is relatively low. The throttle pedal sensitivity decreases, and the transmission shifts up more aggressively. Comfort Mode: This mode is considered a normal operation mode for the car. In this mode, the throttle pedal response is more sensitive than in Eco Mode. Sport Mode: This mode can be used during aggressive driving. When Sport Mode is activated, the throttle pedal response becomes highly sensitive, and the transmission delays shifting. The transmission only upshifts when the engine speed reaches the redline. After switching to Sport Mode, the engine speed is maintained at around 3,000 RPM, ensuring better power response during acceleration. When the car enters ECON mode, it achieves reduced fuel consumption and energy savings, but the power output is weakened. ECON can be understood as an abbreviation for 'economy.' In most cases, it is recommended to keep ECON mode enabled. However, it should be turned off when high torque output is required (e.g., climbing a hill) or when driving at very high speeds. Pressing the ECON button activates a low-carbon, eco-friendly driving mode. Subsequently, the ECU, engine, and transmission operate in the most fuel-efficient manner to execute the driver's intentions, achieving optimal fuel economy through rapid upshifts and smooth acceleration. The air conditioning system also operates in an energy-saving state. When the driver presses the accelerator pedal hard, the ECON system effectively controls the opening and closing of the intake valves to ensure smooth engine operation and energy efficiency. Although ECO mode is simple and effective, it does not work under certain conditions: When the vehicle speed exceeds 120 km/h, priority is given to speed, and the energy-saving mode automatically deactivates. This means that if the car exceeds the economical speed range (typically between 60-90 km/h), ECO mode will not save fuel. The key to ECO mode is its reliance on computer-controlled operations during driving. Therefore, ECO mode does not function when the car is idling, parked, or in Neutral (N), Park (P), or manual mode. When overcoming significant resistance or requiring high torque output (e.g., climbing a hill), the ECU prioritizes delivering sufficient power to drive the car, and ECO mode will not be active in such situations.

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How to Identify Transmission Abnormal Noises?

Symptoms of transmission abnormal noises: 1. Additionally, pay attention to whether there is a backfire sound from the carburetor and whether the engine has severe knocking sounds. 2. If there is a "rustling" sound inside the transmission while driving, which disappears when the clutch or accelerator is pressed, and there is a sound similar to whistling during gear shifting. Below is relevant information about transmission abnormal noises: Methods to solve transmission abnormal noises: 1. The transmission has many components, and the causes of noises are relatively complex. When analyzing and judging, pay attention to: whether it is related to specific speeds, such as some planetary gears making obvious noises around 50Km/h. 2. Whether it is related to certain gears, which is very important for judging transmission faults. If a certain gear makes noise, it is definitely related to the components affecting the transmission of that gear; if all gears make noise, it is often a fault with the constant mesh gear shaft or insufficient oil in the transmission. 3. Whether it is related to specific actions, such as shifting up or down, starting, rapid acceleration, rapid deceleration, turning, etc., which are effective means to judge abnormal noises. Among them, changing speed and direction are particularly important for determining rear axle faults. If the transmission noise is obvious, it is recommended to send it to a professional repair shop to identify the faulty component and then replace it.

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What causes the engine fault warning light to illuminate?

What is the difference between 30 and 40 engine oil?

Can a new car use the license plate from an old car?

Why does the car keep making noise after turning off the engine and opening the hood?

How Long is a Vehicle Inspection Valid After Expiration?

What Does ECON Mean?

How to Identify Transmission Abnormal Noises?

What Causes a Muffled Engine Sound?

What is the difference between body-on-frame and unibody?

How to Remove Fog from Car Windows?

Should You Pull Out a Nail from Your Tire?