DTC DETECTION LOGIC NOTE： If DTC P0122, P0123, P0227 or P0228 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
P0122 | Throttle position sensor 2 (bank 1) circuit low input | An excessively low voltage from the TP sensor 2 is sent to ECM. |

- Harness or connectors
  (TP sensor 2 circuit is open or shorted.)
- Electric throttle control actuator
  (TP sensor 2)

P0123 | Throttle position sensor 2 (bank 1) circuit high input | An excessively high voltage from the TP sensor 2 is sent to ECM.
P0227 | Throttle position sensor 2 (bank 2) circuit low input | An excessively low voltage from the TP sensor 2 is sent to ECM.
P0228 | Throttle position sensor 2 (bank 2) circuit high input | An excessively high voltage from the TP sensor 2 is sent to ECM.

DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure 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