With GST

Start engine and warm it up to normal operating temperature.
Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Turn ignition switch OFF and wait at least 10 seconds.
Disconnect mass air flow sensor harness connector.
Restart engine and let it idle for at least 5 seconds.
Stop engine and reconnect mass air flow sensor harness connector.
Select Service $03 with GST. Make sure DTC P0102 is detected.
Select Service $04 with GST and erase the DTC P0102.
Start engine again and let it idle for at least 10 minutes.
Select Service $07 with GST. The 1st trip DTC P0171 or P0174 should be detected at this stage, if a malfunction exists. If so, go to , "DIAGNOSIS PROCEDURE ".

Fig 1: Identifying Mass Air Flow Sensor And Air Cleaner
Courtesy of NISSAN MOTOR CO., U.S.A.

NOTE: If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine.
3. Maintain the following conditions for at least 10 consecutive minutes. Hold the accelerator pedal as steady as possible.
SPEED REFERENCE CHART

VEHICLE SPEED SE 50 - 120 km/h (31 - 75 MPH)

WARNING: Always drive vehicle at a safe speed.
If it is difficult to start engine at step 8, the fuel injection system has a malfunction.
Crank engine while depressing accelerator pedal. If engine starts, go to , "DIAGNOSIS PROCEDURE ".
If engine does not start, check exhaust and intake air leak visually.