2006 Cadillac CTS EVAP pressure sensor

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

JACOBANDNICKOLAS

MECHANIC
108,164 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

MWATTERSON

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40 POSTS

Emissions

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Wednesday, April 8th, 2015 AT 8:06 PM

JACOBANDNICKOLAS

MECHANIC
108,164 POSTS

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

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

JACOBANDNICKOLAS

MECHANIC
108,164 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.