DTC Detection Logic

WARNING: This page is about a different car, the 2013 Infiniti M56. However, it is still accessible from the selected car via links, so may be relevant.

DTC No.	Trouble diagnosis name (Trouble diagnosis content)	DTC detecting condition	Possible cause
P0550	PW ST P SEN/CIRC (Power steering pressure sensor circuit)	An excessively low or high voltage from the sensor is sent to ECM.	Harness or connectors (Power steering pressure sensor circuit is open or shorted.) (EOP sensor circuit is open or shorted.) (Low fuel pressure sensor circuit is open or shorted.) (FRP sensor circuit is open or shorted.) Power steering pressure sensor EOP sensor Low fuel pressure sensor FRP sensor