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What does it mean when the AT light is on in a car?

1 Answers
BrynleeRose
07/29/25 10:54pm
AT light on is the transmission fault light. The specific reasons for transmission failure are as follows: 1. Transmission oil leakage: Oil seeps out from the transmission housing or oil pan, which may be caused by aging or poor sealing of the sealing components; it could also be due to poor manufacturing processes resulting in sand holes in the housing. 2. Engine stalling, no response, or strong impact when shifting into gear: If there is a strong impact feeling when shifting into gear, it is called positioning shift impact. It should be noted that any automatic transmission will have a certain degree of impact feeling when shifting into gear. If there is no feeling at all, it indicates an internal fault. However, if the impact is too strong, it is unacceptable. The causes of this issue are complex and involve many aspects beyond the transmission itself. Engine stalling when shifting into gear is more noticeable when the car is cold. The problem could be related to the transmission or other body systems. 3. Engine stalling when shifting into D or R gear: This may be caused by a damaged lock-up solenoid valve or a stuck lock-up control valve. After shifting into D or R gear and releasing the brake, the vehicle does not move. Alternatively, the car may drive a short distance after a cold start but cannot move when the engine is warm. This situation is often caused by damage to the input shaft or reverse gear clutch, or damage to the D/R brake. It could also be due to severe automatic transmission oil leakage or extreme oil shortage.
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Why does the car make abnormal noise when accelerating but not in neutral?

Car makes abnormal noise when accelerating but not in neutral because the clutch is faulty and needs to be sent to a repair station for servicing. Below is relevant information about the clutch: 1. Clutch location: The clutch is located inside the flywheel housing between the engine and transmission, with the clutch assembly fixed to the rear plane of the flywheel by screws. The output shaft of the clutch is the input shaft of the transmission. 2. Clutch function: During vehicle operation, the driver can press or release the clutch pedal as needed to temporarily separate or gradually engage the engine and transmission, thereby cutting off or transmitting power from the engine to the transmission.
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What Causes the Car Key to Not Respond and Unable to Open the Door?

The remote key cannot open the car door, which could be due to the remote key's battery being dead, the car's battery being dead, or strong signal interference in the surrounding area. If the mechanical key also fails to open the door, it might be because the car's central locking system is in an electronically locked state or the door lock cylinder is stuck. If the remote key cannot open the door: Replace the remote key's battery or find the hidden mechanical key inside the remote key to open the door. However, manufacturers now often hide the keyhole for aesthetic reasons. If the mechanical key cannot open the door: There are two possible scenarios. One is that the car's central locking system is in an electronically locked state, requiring a wait of one to two hours for the lock to release before attempting to unlock again. The other is that the door lock cylinder has become stuck over time and cannot be turned. In this case, you can only contact a 4S store for repairs or resort to forceful methods like breaking the window. Functions of the car remote key: Press and hold the lock button after turning off the engine to close the windows; press the horn button on the key to alert the owner of the vehicle's location; press and hold the trunk unlock button to open it automatically; press the unlock button once to open only the driver's door, and press twice to open all doors. Car key maintenance tips: Avoid frequently placing the key with metal objects; do not store the spare key in the car door; prevent the smart key from falling or being impacted; avoid exposing the smart key to high temperatures or liquids; do not place the key near electronic devices. Door precautions: Try to avoid exposing the car door lock to rain, as the small springs inside the lock can rust, leading to reduced flexibility. When using the door lock, if you notice difficulty in operation, spray lubricant on the lock tongue. In extremely cold weather, the door might freeze shut. Use warm water to thaw it or wait for the temperature to rise before attempting to open it.
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Where is the turn signal fuse located in the Skoda Octavia?

The turn signal fuse in the Skoda Octavia is located in the fuse box between the left front door and the instrument panel. Here is relevant information: 1. Introduction: As the first sedan under SAIC Volkswagen Skoda brand, the Skoda Octavia is an advanced model synchronized with European versions, incorporating extensive localization improvements for the Chinese market. It was successfully launched in China on June 6, 2007. 2. Product Highlights: The exterior design features simplicity and elegance. The vehicle adopts Skoda's new family design language, presenting a styling that is simple, fashionable, and sophisticated, with exquisite detailing that enhances its overall appeal. Particularly noteworthy is the integrated panoramic sunroof with black trim, where the black elements extend from the front to the middle of the roof. The extended full-opening design creates excellent visual continuity and provides outstanding cabin transparency.
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What Causes the Abnormal Noise When Starting After Releasing the Handbrake?

This is a normal phenomenon for automatic transmission vehicles. The abnormal noise from the brakes can be attributed to two main factors: the gap in the brake pads and the uneven hardness of the brake discs, which may contain metals like copper, leading to an uneven surface on the brake pads. Here are some precautions for using the handbrake: 1. Avoid pulling the handbrake to 100%: The purpose of the handbrake is to stabilize the vehicle after stopping and prevent accidents caused by rolling. However, pulling the handbrake to its maximum is not ideal; pulling it to about 70%-80% is sufficient. Over-tightening the handbrake can shorten the lifespan of the handbrake cable. 2. Never engage the handbrake directly during high-speed driving: Applying the handbrake directly while driving at high speeds is extremely dangerous. Since the handbrake typically acts on the rear wheels, sudden engagement can cause one of the rear wheels to lock up, leading to skidding or even a rollover.
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Which side is the front brake and which is the rear brake on a motorcycle?

On a motorcycle, the left-hand lever controls the rear brake, while the right-hand lever controls the front brake. Motorcycle braking differs significantly from car braking, and mastering the braking force is a challenging aspect for beginners. Braking too hard can lead to accidents, while braking too softly is equally dangerous. It's essential to control the overall braking force and make accurate pre-judgments to ensure proper braking intensity. After all, safe braking is the most critical factor for motorcycles. Motorcycle braking techniques: When riding at high speeds, the front brake force must be greater than the rear brake force, but not to the point of locking the front wheel. During braking, the rear wheel cannot provide sufficient friction to stop quickly, whereas the front wheel can. When braking uphill, the front brake force can be slightly increased to effectively and quickly bring the vehicle to a stop. When braking downhill, the rear brake force can be slightly increased to prevent the rear wheel from lifting due to excessive speed, which could cause a rollover. During emergency braking, the braking force should be slightly less than the locking force to prevent the tires from locking up and causing the vehicle to skid, which could endanger personal safety. On slippery roads, the rear brake should be applied before the front brake. Braking should involve both brakes simultaneously, as the front brake is primarily designed to assist the rear brake in achieving effective braking. Using only the front or rear brake alone will not achieve a short braking distance—combining both ensures optimal braking performance.
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Fasten Seat Belt or Start the Engine First?

Fasten the seat belt first. The function of the seat belt is to reduce the possibility of death or serious injury in traffic collisions by minimizing the secondary impact force that poses an internal collision risk. Below are relevant details: 1. Hazards of not wearing a seat belt: In the event of a vehicle accident or emergency braking, a significant inertial force is generated. Depending on the driving speed and the severity of the impact, this inertial force varies, causing the driver and passengers to collide with objects inside the vehicle such as the steering wheel, windshield, seat backrest, and doors, which can easily result in severe injuries to the occupants or even eject them from their seats or out of the vehicle. 2. Introduction to seat belts: A seat belt is a vehicle safety device designed to protect vehicle occupants from harmful movements that may occur during a collision or sudden stop. By properly positioning the occupants, it ensures the maximum effectiveness of airbags and prevents occupants from being ejected from the vehicle during a collision or in the event of a rollover.
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