DTC DETECTION LOGIC NOTE： If DTC P0237, P0238, P0241 or P0242 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
P0237 | Turbocharger boost sensor (bank 1) circuit low input | An excessively low voltage from the sensor is sent to ECM. |

- Harness or connectors
  (The sensor circuit is open or shorted.)
- Turbocharger boost sensor

P0238 | Turbocharger boost sensor (bank 1) circuit high input | An excessively high voltage from the sensor is sent to ECM.
P0241 | Turbocharger boost sensor (bank 2) circuit low input | An excessively low voltage from the sensor is sent to ECM.
P0242 | Turbocharger boost sensor (bank 2) circuit high input | An excessively high voltage from the sensor 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.

>>GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 5 seconds.
2. Check 1st trip DTC.

Is 1st trip DTC detected?
YES>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
NO>>INSPECTION END