Can You Continue Driving When the AT Light Is On?

1 Answers
VanRuby
07/30/25 2:06am
at light is the transmission fault indicator, it is recommended not to continue driving and to seek immediate repair. Reasons for the transmission fault light to illuminate: Intermittent or persistent faults in the automatic transmission's electronic components (sensors, solenoids, control module). Mechanical failures in automatic transmission models, such as engine idling, transmission slipping, or other severe transmission issues, which trigger the transmission control unit to activate fault alerts and illuminate the transmission fault light. Transmission fluid overheating causing the fault light to come on, such as overfilling the transmission fluid, internal or external blockage of the transmission cooler (common during high-temperature seasons), or transmission high-temperature protection due to torque converter lock-up slippage. Symptoms of transmission faults: Delayed response: The transmission should shift quickly and accurately to the correct gear. Difficulty or hesitation during shifting indicates a problem. Difficulty starting: If the engine revs up when accelerating but the car does not accelerate noticeably, it may be due to transmission fluid leakage, which reduces internal lubrication, increases gear friction, and prevents normal operation. Engine stalling after shifting: If the engine stalls immediately after shifting from P to another gear upon starting the car, it may be due to a faulty lock-up solenoid, stuck or damaged lock-up control valve, or input shaft speed sensor failure.
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