Transmission temperature light
Also called: transmission overheat light, AT temp
The transmission fluid is running hot.
What it means
This light means the transmission fluid temperature is too high, often from towing, hauling, hills or stop-and-go heat. Hot fluid breaks down fast, and heat is the biggest killer of automatic transmissions.
Green, yellow, red: three ways this can look
Match your situation to the closest example.
Keep an eye on it
It came on while towing up a long grade and went off after easing up. Let it cool and keep the load in mind.
Schedule a repair
It comes on in normal driving. The fluid may be low or worn out, or the cooler blocked. Book a fluid check.
Stop and get help
It's on with slipping, harsh shifts or a burning smell. Pull over and let it cool with the engine idling in park. Continuing can ruin the transmission.
Common causes
- Heavy towing or hauling
- Low or old transmission fluid
- Blocked transmission cooler
- Slipping clutches inside the transmission
What to do right now
- Ease off and let it cool, idling in park
- Check the fluid if your vehicle has a dipstick
- Schedule a fluid service if it's overdue
Related guides
Symbols and meanings vary a little by make and model. Your owner's manual has the exact meaning for your vehicle.
Other warning lights
Questions
What does the transmission temperature light mean?
The transmission fluid is running hot. This light means the transmission fluid temperature is too high, often from towing, hauling, hills or stop-and-go heat. Hot fluid breaks down fast, and heat is the biggest killer of automatic transmissions.
Can I keep driving with the transmission temperature light on?
Green: It came on while towing up a long grade and went off after easing up. Let it cool and keep the load in mind. Yellow: It comes on in normal driving. The fluid may be low or worn out, or the cooler blocked. Book a fluid check. Red: It's on with slipping, harsh shifts or a burning smell. Pull over and let it cool with the engine idling in park. Continuing can ruin the transmission.
What causes the transmission temperature light?
Common causes: heavy towing or hauling; low or old transmission fluid; blocked transmission cooler; slipping clutches inside the transmission.
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