These are Automatic Transmission Oil Temperature Indicator symbols. Generally seen in red, it means exactly what it says, that the oil temperature in the transmission is too high, which risks transmission failure. Some manufacturers show the symbol as amber. This indicator is generally available in 4- or all-wheel drive vehicles with towing packages.
A picture symbol may also be used. It is a ‘bumpy ring’ with a thermometer symbol inside it. The ring is used to represent a transmission in a number of instances. Pull over and allow the transmission to cool down or there is a risk of failure.
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