
No matter the cause, an overheated transmission should be treated like an overheated engine. Here are a few reasons why your vehicles transmission could heat up: To prevent overheating, ensure your cooling components, like the thermostat and radiator, are working properly - and can maintain optimal transmission fluid temperature. Transmission overheating is the most common reason for a transmission light to come on. Here are a few other transmission problems that might trigger this warning light: 1. The transmission light can show up due to problems like a simple electrical malfunction, low transmission fluid level, or difficulty shifting gears. 7 Key Causes For A Lit Transmission Warning Light So why does a transmission light turn on?
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Also, manual transmission cars don’t have a transmission warning light. NOTE: Your vehicle may be forced into a fail-safe or limp mode when the transmission dashboard warning light turns on.

An illuminated check engine light is an early indicator of transmission and other related problems. The check engine light may also pop on, along with the transmission warning light. Certain vehicles may have a simple text string alerting you of an issue, while others may not even have a transmission light. It’s a visible light with a distinct symbol, so you’ll be hard-pressed to miss it - a gearwheel encircling a thermometer or exclamation point is pretty common. How your transmission light looks depends on your vehicle’s make and model.
