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Where is the fuel temperature sensor located?

1 Answers
RyderLee
07/29/25 6:22pm

The fuel temperature sensor is installed on the high-pressure fuel rail and can directly measure the temperature of the fuel flowing through the return line. Here is relevant information: 1. Working principle: The sensor is mounted on the high-pressure fuel rail to directly measure the temperature of fuel in the return line, as fuel density and viscosity change with temperature. The ECU uses this data to adjust fuel flow. 2. Function: It detects fuel temperature, and the engine control unit utilizes this signal to calculate injection timing and quantity. This signal also controls the fuel cooling pump switch. When the signal is lost, the engine control unit substitutes it with coolant temperature data to maintain operation.

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