DTC Diagnosis Procedure
WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
- PERFORM IDLE AIR VOLUME LEARNING
Perform Description .
Is Idle Air Volume Learning carried out successfully?
YES
GO TO 2.
NO
Follow the instruction of Idle Air Volume Learning.
- CHECK Intake system
Check for the cause of intake air volume lacking. Refer to the following.
- Crushed intake air passage
- Intake air passage clogging
- Clogging of throttle body
Is the inspection result normal?
YES
GO TO 3.
NO
Repair or replace malfunctioning part
- CHECK FUEL INJECTION SYSTEM FUNCTION
Perform DTC Confirmation Procedure for DTC P0171, P0174. Refer to DTC Description , DTC Description .
Is the inspection result normal?
YES
GO TO 4.
NO
Proceed to DTC Description , DTC Description for DTC P0171, P0174.
- PERFORM DTC CONFIRMATION PROCEDURE
- Turn ignition switch ON.
- Erase DTC.
- Perform DTC Confirmation Procedure.
See DTC Description .
Is the 1st trip DTC P050A displayed again?
YES
Replace ECM. Refer to Removal and Installation .
NO
INSPECTION END