2001 INFINITI I30 User Manual

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On Board Diagnosis Logic

NHEC0644

NOTE:

If DTC P0455 is displayed with P1448, perform trouble diagnosis for DTC P1448 first. (See EC-564.)

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.

SEF323U

Malfunction is detected when EVAP control system has a very large leak such as fuel filler cap fell off, EVAP

control system does not operate properly.

CAUTION:

I Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used,

the MIL may come on.

I If the fuel filler cap is not tightened properly, the MIL may come on.

I Use only a genuine NISSAN rubber tube as a replacement.

Possible Cause

NHEC0645

I Fuel filler cap remains open or fails to close.

I Incorrect fuel tank vacuum relief valve

I Incorrect fuel filler cap used

I Foreign matter caught in fuel filler cap.

I Leak is in line between intake manifold and EVAP canister

purge volume control solenoid valve.

I Foreign matter caught in EVAP canister vent control valve.

I EVAP canister or fuel tank leaks

I EVAP purge line (pipe and rubber tube) leaks

I EVAP purge line rubber tube bent.

I Blocked or bent rubber tube to EVAP control system pressure

sensor

I Loose or disconnected rubber tube

I EVAP canister vent control valve and the circuit

I EVAP canister purge volume control solenoid valve and the

circuit

I Absolute pressure sensor

I Fuel tank temperature sensor

I O-ring of EVAP canister vent control valve is missing or dam-

aged.

DTC P0455 EVAP CONTROL SYSTEM (GROSS LEAK)

On Board Diagnosis Logic

EC-402

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User Manual - Page 402