Code P0446

Tiny
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
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Tuesday, March 8th, 2022 AT 11:10 AM

4 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
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
Tiny
KHATRI
  • MEMBER
Thanks Joe.
Abdul
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Wednesday, March 9th, 2022 AT 7:36 AM
Tiny
KHATRI
  • MEMBER
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
Tiny
JACOBANDNICKOLAS
  • EXPERT
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

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