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Its code P0496 on the OBD2

Tiny
MUAYTHAI8
  • MEMBER
  • 2004 CADILLAC ESCALADE
  • 148,000 MILES
I have a 2003 cadillac escalade base v8 6.0. Where is the location of the evaporative emission high purge flow valve?
Sunday, November 20th, 2011 AT 10:22 PM

4 Replies

Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
The purge solenoid is located at the top of the engine near the intake manifold. Here is a guide and a video that shows the location.

https://youtu.be/iH92vcUWJzs

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers
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Sunday, November 20th, 2011 AT 11:03 PM
Tiny
DAN T
  • MEMBER
  • 2 POSTS
  • 2005 CADILLAC ESCALADE
  • V8
  • AWD
  • AUTOMATIC
  • 54,000 MILES
Car coded for a po446. Replaced vent solenoid valve. Reset light came back on.
Checked for power to the vent sol. Valve good. Checked for ground to the valve by activating the valve with the scanner, no ground signal. Traced the ground wire back to the pcm (white wire pos. 45)back probed and checked for ground signal again, nothing. Brough car to dealer they check and came up with the same thing and replaced the pcm. When I picked up the car I asked if they ran a function test and they said yes and it passed. Two days later light came back on. Pull the evap canister and it had some dirt in it so I replaced it. Reset light back on in two days. Replaced fuel tank pres. Sensor, purge solenoid valve.

I am able to click the vent sol. Valve with my tester. The light remains on.I blew out the evap lines the light remains on.
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Monday, October 1st, 2018 AT 10:51 AM (Merged)
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
Can you run what's called a purge/seal function with your scanner? I recently had an H2 that had a solenoid replaced previously that ended up having a defective vent solenoid. When taken apart, the spring inside was lodged in a way to prevent the valve from venting in adequate time. If you can perform the purge/seal test, monitor the FTP data. See that it not only builds vacuum, but also releases it. There is no real way to measure the rate of time it takes to vent, but it shouldn't be noticeably slow. Almost as fast as removing the fill cap. Or if it is accessible, disconnect the hose at the vent solenoid. Compare the rate with solenoid, and disconnecting hose. When blowing through the defective solenoid by mouth, you could feel some restriction, blowing through a new one gave no restriction.
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Monday, October 1st, 2018 AT 10:51 AM (Merged)
Tiny
DAN T
  • MEMBER
  • 2 POSTS
Thank you for your response.I can not run that function with my tester. But I did have doubts about the first valve that I replaced so I did put another one in.I can blow freely through them. Thank you again
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Monday, October 1st, 2018 AT 10:51 AM (Merged)

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