DTC codes / Ford codes / P1783
P1783 on Ford vehicles means the transmission control module has calculated that the automatic transmission fluid temperature has exceeded a safe limit, usually by comparing the transmission fluid temperature sensor signal against a threshold stored in its strategy. The code is set when the fluid is genuinely overheated or when the sensor circuit reports a temperature that the module interprets as overheating.
Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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