DTC P0181: Fuel Temperature Sensor Circuit Range/Performance Problem: Operation

A 5-volt voltage is applied to the fuel temperature sensor output terminal (terminal No. 3) from the ECM (terminal No. 77) or PCM (terminal No. 51) via the resistor in the ECM (M/T) or PCM (A/T). The fuel temperature sensor output voltage increases when resistance increases and decreases when resistance decreases. The ground terminal (terminal No. 2) is grounded to vehicle body. See Figure and Figure .