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 constantly approximately 1.5 volts. Possible causes are:
- Air/Fuel ratio (A/F) sensor (sensor 1) circuit is open or shorted.
- Defective Air/Fuel ratio (A/F) sensor (sensor 1).
For DTC confirmation procedure and overall function check, see Figure and Fig 1 .