On Board Diagnosis Logic

CAUTION:

Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.
In the fuel filler cap is not tightened properly, the MIL may come on.
Use only a genuine NISSAN rubber tube as a replacement.

This diagnosis detects a very large leak (fuel filler cap fell off etc.) in EVAP system between the fuel tank and EVAP canister purge volume control solenoid valve.

Figure

Fig 1: Identifying DTC P0455 Conditions & Possible Causes

Courtesy of NISSAN MOTOR CO., U.S.A.