DTC DETECTION LOGIC NOTE： If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to DTC Logic (GT-R certified NISSAN dealer).

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 2 circuit is open or shorted.)
  [CKP sensor (POS) circuit is shorted.]
  [CMP sensor (PHASE) (bank 2) circuit is shorted.]
  (Power steering pressure sensor circuit is shorted.)
  (Manifold absolute pressure sensor circuit is shorted.)
  (Refrigerant pressure sensor circuit is shorted.)
- Accelerator pedal position sensor (APP sensor 2)
- Crankshaft position sensor (POS)
- Camshaft position sensor (PHASE) (bank 2)
- Power steering pressure sensor
- Manifold absolute pressure sensor
- Refrigerant pressure sensor

DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
>>GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for 1 second.
2. Check DTC.

Is DTC detected?
YES>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
NO>>INSPECTION END