On Board Diagnosis Logic: Notes

WARNING: This page is about a different car, the 2005 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

This self-diagnosis has the one trip detection logic .

NOTE: If DTC P2138 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229. Refer to "DTC P1229 SENSOR POWER SUPPLY ".

DTC CONDITION DETECTING CHART

DTC No.	Trouble diagnosis name	DTC detecting condition	Possible cause
P2138 2138	Accelerator pedal position sensor circuit range/performance problem	Rationally incorrect voltage is sent to ECM compared with the signals from APP sensor 1 and APP sensor 2.	Harness or connector (APP sensor 1 and 2 circuit is open or shorted.) (TP sensor circuit is shorted.) Accelerator pedal position sensor 1 and 2 Electric throttle control actuator (TP sensor)