Code P0446

KHATRI

MEMBER
2007 FORD FOCUS
2.0L
4 CYL
2WD
AUTOMATIC
85,000 MILES

Need computer pinout for evap vent solenoid. Cannot turn off Check Engine Light. Replaced computer. Check Purge solenoid, vent solenoid Voltage at vent solenoid: 12v, Switched ground at vent solenoid: 0v. Repair shop gave up.
If I can get computer in connected to vent switched ground, I will be able to check its continuity.
Thanks

4 Replies

JACOBANDNICKOLAS

MECHANIC
108,133 POSTS

Hi,

I attached the entire powertrain management wiring schematic below. Pics 1 and 2 show the vent valve and purge valve. I highlighted the one and the other is right next to it.

Please note that I had to cut each page in half to make it readable for you. I did overlap them so you can follow from one to the next.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below.

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Tuesday, March 8th, 2022 AT 8:13 PM

KHATRI

MEMBER
2 POSTS

Thanks Joe.
Abdul

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Wednesday, March 9th, 2022 AT 7:36 AM

KHATRI

MEMBER
2 POSTS

The schematic helped a lot. The problem was with the wire running between the engine computer and the evap vent solenoid. It was picking up voltage from somewhere. I replaced it and the problem was solved. No Check Engine light.

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Wednesday, March 30th, 2022 AT 5:21 PM

JACOBANDNICKOLAS

MECHANIC
108,133 POSTS

Hi,

Thank you for the update and I'm glad you found the issue. Wiring can become a nightmare. LOL

Regardless, please feel free to come back anytime in the future if you need help. You are always welcome here.

Take care,

Joe

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Wednesday, March 30th, 2022 AT 8:07 PM