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.

NOTE: If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to "DTC LOGIC ".

DTC No.	Trouble diagnosis name (Trouble diagnosis content)	DTC detecting condition	Possible cause
P2138	APP SENSOR (Accelerator pedal position sensor circuit range/performance)	Rationally incorrect voltage is sent to ECM compared with the signals from APP sensor 1 and APP sensor 2.	Harness or connectors (APP sensor 1 or 2 circuit is open or shorted.) (Battery current sensor circuit is shorted.) (Crankshaft position sensor circuit is open or shorted.) [Camshaft position sensor (bank 1) circuit is shorted.] (EVAP control system pressure sensor circuit is shorted.) (Refrigerant pressure sensor circuit is shorted.) Accelerator pedal position sensor (APP sensor 1 or 2) Battery current sensor Crankshaft position sensor Camshaft position sensor (bank 1) EVAP control system pressure sensor Refrigerant pressure sensor