Code p0446 system vent control circuit?

2003 CHEVROLET ASTRO
83,000 MILES • 2.6L • V6 • 2WD • AUTOMATIC
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DEQUESO
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I have replaced the purge valve, also canister vent valve and gas cap. Drive 90 miles same code returns I clear code drive around 70 miles code returns etc, etc. I have checked the electrical connections all good.
Sep 20, 2023 at 7:33 AM
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STRAILER
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Here is the definition of the code and this problem occurs when the EVAP purge solenoid goes out.

P0446 - Evaporative Emission Control System Vent Control Circuit Malfunction

Here is the location of the EVAP purge solenoid #13. Check out the images (below). Please let us know if you need anything else to get the problem fixed.
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Sep 21, 2023 at 7:07 AM
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DEQUESO
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I have replaced that solenoid plus canister vent valve also gas cap, have checked the electrical on the solenoid and wire conn all good. If I have a leak, why would it be so erratic? Plus, what does it hurt if it leaks???
Sep 23, 2023 at 2:06 AM
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STRAILER
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  • 55,051 POSTS
This is a circuit code which means the valve is bad, the wiring or the PCM. It does really hurt anything except for having the check engine light on.
Sep 24, 2023 at 3:04 AM
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