Purge Flow (PF) Sensor
Turn ignition off. Disconnect PF sensor wiring harness connector. Allow sensor to cool to room temperature. Measure resistance between PFS SIG terminal and VPWR terminal. See Fig 1 . If resistance is not 40-230 ohms, replace PF sensor. If resistance is 40-230 ohms, sensor is okay. If fault is still present, go to CIRCUIT TEST HW in appropriate article:
- For 3.8L vehicles, see TESTS W/CODES - 3.8L .
- For 4.6L SOHC vehicles, see TESTS W/CODES - 4.6L SOHC .
- For 4.6L DOHC vehicles, see TESTS W/CODES - 4.6L DOHC .