DTC Detection Logic

WARNING: This page is about a different car, the 2013 Infiniti FX50. 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

DTC detecting condition

Possible cause

P2138

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.)

[CKP sensor circuit is shorted.]

[CMP sensor (bank 1) circuit is shorted.]

[EVT control position sensor (bank 1) circuit is shorted.]

(Battery current sensor circuit is shorted.)

(EVAP control system pressure sensor circuit is shorted.)⁽¹⁾

(Manifold absolute pressure sensor circuit is shorted.)
Accelerator pedal position sensor (APP sensor 1 or 2)
Crankshaft position sensor
Camshaft position sensor (bank 1)
Exhaust valve timing control position sensor (bank 1)
Battery current sensor
EVAP control system pressure sensor⁽¹⁾
Manifold absolute pressure sensor

⁽¹⁾	Except for Mexico