2006 Cadillac CTS EVAP pressure sensor

Tiny
MWATTERSON
  • MEMBER
  • 2006 CADILLAC CTS
  • 148,000 MILES
We're is the evap pressure sensor located. Is this something
That easy to do or does it need to be taken to a dealer to fix.
Wednesday, April 8th, 2015 AT 4:42 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
When you say EVAP pressure sensor, are you referring to the emissions components or the AC?
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Wednesday, April 8th, 2015 AT 7:27 PM
Tiny
MWATTERSON
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  • 40 POSTS
Emissions
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Wednesday, April 8th, 2015 AT 8:06 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Okay, there isn't anything actually called a pressure sensor. Can you provide a code so I can look into it for you?
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Thursday, April 9th, 2015 AT 8:27 AM
Tiny
MWATTERSON
  • MEMBER
  • 40 POSTS
The code is PO496, thank you for helping me.
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Thursday, April 9th, 2015 AT 5:02 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Okay, that makes sense. That deals with what is called the purge valve in the EVAP system. What is happening is under a non-purge condition, there is too much pressure building up in the system. That is where the term pressure sensor came from. Now I understand. There are a few things that can cause this:

EVAP canister vent valve not operating
EVAP canister could be plugged
Faulty EVAP pressure sensor
EVAP canister vent wiring is shorted, open, or has a poor connection.
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Thursday, April 9th, 2015 AT 6:04 PM

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