P0440?

Answer

If one is getting the P0440 code in one's car, it is a trouble code that indicates that the EVAP system is not correctly functioning. There are a few reasons for this code, including: gas cap not working properly, failed purge solenoid, and canister is plugged in and malfunctioning. It is unlikely one would notice this issue while driving.
Reference:
Q&A Related to "P0440?"
Hi there, Oldsmobile code P0440 refers to: Evaporative Emission System This means there is a problem with the Evap System, and you will need to inspect the related components: - Purge
http://www.fixya.com/support/t3412519-p0440_proble...
Large evaporative emissions vapor leak. Check gas cap and all hoses from the engine to the gas tank.
http://wiki.answers.com/Q/What_is_the_P0440_OBDII_...
Evaporative Emission Control System Malfunction This indicates that a part of
http://www.chacha.com/question/what-is-the-p0440-c...
Check gas cap, evap. Cannister, and evap. Hoses.
http://www.askmehelpdesk.com/cars-trucks/obd-ii-co...
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