What Causes the Transmission Light to Illuminate?

1 Answers
AbelAnn
07/29/25 8:09pm
Reasons for the transmission light to illuminate: 1. The transmission software has not been updated for a long time or there is a defect in the transmission software, causing the transmission warning light to turn on; 2. Damage to the transmission control unit preventing the vehicle from moving after shifting gears, which will also cause the warning light to illuminate; 3. Failure of internal transmission sensors resulting in the inability to move after shifting gears, which will trigger the transmission warning light; 4. Open circuits in the transmission wiring or poor communication, leading to the warning light turning on; 5. Damage to the internal gear shifting mechanism of the transmission, causing the transmission warning light to illuminate. When the transmission warning light comes on, the vehicle should be taken to a repair shop or a 4S dealership. Special diagnostic equipment should be used to access the transmission system and retrieve the fault memory. The fault codes stored in the memory should be checked, and repairs should be carried out based on the indications provided by the fault codes.
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