DTC P0180 - FUEL TEMPERATURE SENSOR Nissan 240SX S14

1. Check Power Supply Turn ignition off. Disconnect fuel temperature sensor harness connector from fuel tank. (Scheme 23) Turn ignition on. Measure voltage between sensor harness connector terminal "1" (Yellow wire) and ground. If about 5 volts are is present, go to next step. If voltage is not about 5 volts, repair wiring harness and/or connector as necessary.
2. Check Ground Circuit Turn ignition off. Check for continuity between sensor harness connector terminal "2" (Black wire) and ground. If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
3. Check Component Ensure ignition is off. Measure resistance between fuel temperature sensor connector terminals as follows: (Scheme 24) With temperature at 68°F (20°C), resistance should be 2300-2700 ohms. With temperature at 122°F (50°C), resistance should be 790-900 ohms. If resistance is not as specified, replace fuel temp sensor.

Scheme 23

Scheme 24