p0440 engine code? - VW Forum :: Volkswagen Forum
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post #1 of 5 (permalink) Old 12-28-2006, 08:03 PM Thread Starter
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p0440 engine code?

Hey, my check engine light came on in my 96 vr6 and when i scanned it this code came up. Does anyone know what this code means?
Thanks alot,
Sean
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post #2 of 5 (permalink) Old 12-28-2006, 09:05 PM
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From the few results I found on google, it seems like it could be a loose or faulty gas cap. I know when I bought my car it wouldn't pass emissions until I put on a stock gas cap, dunno if that is your issue or not.

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post #3 of 5 (permalink) Old 12-29-2006, 11:06 PM
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Evaporative Emission Control System Malfunction
What does that mean?

This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.


Symptoms:
You likely won't notice any drivability problems.


Causes:
A code P0440 could mean one or more of the following has happened:

* The gas cap is not installed or working properly
* The purge solenoid has failed
* The canister is plugged and not working properly


Possible Solutions
With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:

* Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
* Inspect the EVAP system for cuts/holes in tubes/hoses
* Inspect for damaged or disconnected hoses around the Evap purge solenoid
* Check and/or replace the sensor
* Check and/or replace the purge valve
* Have a professional use a smoke machine to detect leaks


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post #4 of 5 (permalink) Old 12-30-2006, 11:16 AM
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Check your gas cap and purge solenoid valve. Two most common EVAP problems on MK3's.
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post #5 of 5 (permalink) Old 04-30-2007, 11:45 AM
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Quote:
Originally Posted by vdubjunkie37
Check your gas cap and purge solenoid valve. Two most common EVAP problems on MK3's.
Hate to bump an old thread, but where exactly is the purge valve on a 97 vr6?
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