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

1Answers
MartinDella
07/29/2025, 06:43:17 PM

When the AT light in a car is on, it indicates a transmission fault. Symptoms of transmission fault light activation: Issues such as jerking, abnormal noises, slipping, or impact may occur, which require timely repair. If the AT light is on, you can try turning off the engine and restarting to see if it returns to normal. If it does not return to normal or if there is shifting impact, it is usually a real fault in the transmission system. Car Transmission: The transmission is a mechanism used to change the speed and torque from the engine, fixed or stepped to alter the transmission ratio between the output shaft and the input shaft, also known as the gearbox. The transmission consists of a transmission mechanism and a control mechanism, and some cars also have a power take-off mechanism.

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