Possible Causes
WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
ECM illuminates MIL and sets DTC P0181 when a rationally incorrect voltage from FTT sensor is sent to ECM, when compared with voltage signals from engine coolant temperature sensor and intake air temperature sensor. Possible causes are:
- FTT sensor circuit open or shorted.
- Poor, loose, corroded or damaged terminal connections.
- Defective FTT sensor.