Code p0446 system vent control circuit?

2003 CHEVROLET ASTRO
83,000 MILES • 2.6L • V6 • 2WD • AUTOMATIC
Avatar
DEQUESO
  • MEMBER
  • 38 POSTS
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 2:33 PM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,982 POSTS
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.
Image (Click to enlarge)
Attached Media
Sep 21, 2023 at 2:07 PM
Avatar
DEQUESO
  • MEMBER
  • 38 POSTS
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 9:06 AM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,982 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 10:04 AM