DTC Confirmation Procedure & Overall Function Check
WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
DTC will set when the A/F signal computed by ECM from the A/F sensor (sensor 1) signal is shifted to the lean side for a specified period. Possible causes are:
- Defective Air/Fuel ratio (A/F) sensor (sensor 1).
- Defective Air/Fuel ratio (A/F) sensor (sensor 1) heater.
- Incorrect fuel pressure.
- Defective injectors.
- Intake air leaks.
For DTC confirmation procedure and overall function check, see Figure and Fig 1 .