Quote:
|
I also have a code of PO440 EVAP system failure for a few months as well.
|
The EVAP system failure can be one of several things. It may be the gasket on your gas cap is bad and causing a leak, or just your gas cap is loose. There may also be a vaccuum hose leak.
Here is some more info on that:
Quote:
|
Diagnostic trouble code (DTC) #P0440 concerns the EVAP system. Evaporative leak detection strategy is based on applying vacuum to EVAP system and monitoring vacuum decay. The Powertrain Control Module (PCM) monitors vacuum level by means of a fuel tank vacuum sensor input. At a predetermined time, EVAP purge solenoid and EVAP vent solenoid are turned on. This allows engine vacuum to draw a small vacuum on the entire EVAP system. Whenever a sufficient vacuum level cannot be achieved, a large leak or faulty EVAP purge solenoid is indicated, consequently the check engine lamp is illuminated. Before you get to aggressive on repairs a simply suggestion would be to make sure the fuel cap is tighten correctly and/or replace fuel cap and have the DTC cleared. Fuel cap problems can regularly set the specific DTC in question.
|
http://class.heraldnet.com/undertheh...dex.cfm?id=845