codes
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
Racer
Joined: Jul 2010
Posts: 262
Likes: 2
From: Shawnee Kansas
P0440 H = History
Make sure you gas caps on tight, Clear Code and see if it repeats.
CIRCUIT DESCRIPTION
The PCM tests the EVAP system for the following conditions:
Large and small leaks
Excess vacuum
Purge flow during non-commanded conditions
Fuel level and fuel pressure sensor faults
EVAP purge and vent valve faults
The PCM monitors the fuel tank pressure sensor in order to determine the level of vacuum/pressure in the EVAP system. The PCM commands both the EVAP Purge Solenoid and the EVAP Vent Valve ON when the conditions for running the DTC are met in order to apply an engine vacuum to the EVAP system. The PCM commands the EVAP purge solenoid OFF once the system has reached a predetermined level of vacuum. This test verifies if a vacuum can be achieved in the EVAP system. Failure to develop a vacuum may be caused by a large leak or a restriction. This DTC sets after twice failing the above test.
Make sure you gas caps on tight, Clear Code and see if it repeats.
CIRCUIT DESCRIPTION
The PCM tests the EVAP system for the following conditions:
Large and small leaks
Excess vacuum
Purge flow during non-commanded conditions
Fuel level and fuel pressure sensor faults
EVAP purge and vent valve faults
The PCM monitors the fuel tank pressure sensor in order to determine the level of vacuum/pressure in the EVAP system. The PCM commands both the EVAP Purge Solenoid and the EVAP Vent Valve ON when the conditions for running the DTC are met in order to apply an engine vacuum to the EVAP system. The PCM commands the EVAP purge solenoid OFF once the system has reached a predetermined level of vacuum. This test verifies if a vacuum can be achieved in the EVAP system. Failure to develop a vacuum may be caused by a large leak or a restriction. This DTC sets after twice failing the above test.
Last edited by Kevin Kuse; Feb 11, 2011 at 05:32 PM.
