* Insufficient transmission fluid can cause the warning light to come on even if there is nothing wrong with the transmission pump or any other parts.
* The first thing to check when you see the transmission warning light is the fluid level.
* If the fluid is low, make sure to fill it to the proper level and drive around to see if the light turns off.
Worn-out transmission filter
* Next to checking the fluid level, you should also check the transmission filter for any clogs.
* If the filter is clogged, it can restrict the flow of transmission fluid and cause the warning light to come on.
* If you have recently had your oil changed, there’s a possibility the filter was not replaced.
Faulty transmission solenoid
* Transmission solenoids are responsible for controlling the flow of fluid within the transmission.
* If a transmission solenoid begins to stick or fails, it will not be able to properly regulate fluid flow and the transmission will not be able to properly shift gears.
* This can also be the cause of the warning light illuminating on the dash.
Faulty transmission sensors
* There are multiple transmission sensors that relay important data to the transmission computer.
* If one of the sensors fails, the computer will not have the information it needs and the transmission will not be able to operate correctly.
* A flashing or blinking transmission warning light often means that there is an issue with the transmission speed sensors, which relay information about the speed of the rotating components in the transmission to the transmission control module.
Internal Transmission Failure
* If the transmission warning light is accompanied by other symptoms such as grinding noises, slipping gears, or a burning smell, it is possible that the transmission is experiencing an internal failure.
* This could be due to a variety of reasons, such as wear and tear, lack of maintenance, or a defect in the transmission itself.
