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Got a p0496 code on 2005 buick terraza. Replaced the

Customer Question
Got a p0496 code...

Got a p0496 code on 2005 buick terraza

Mechanic's Assistant: Just to clarify, what's the exact code? And have you tried to reset it?

Yes

Mechanic's Assistant: Are you fixing your Terraza yourself? What have you tried so far?

Replaced the solenoid purge valve

Submitted: 5 months ago.Category: Buick
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Answered in 1 minute by:
3/6/2018
Buick Mechanic: Ron, ASE Certified Technician replied 5 months ago
Ron
Ron, ASE Certified Technician
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Buick Mechanic: Ron, ASE Certified Technician replied 5 months ago

Was this the Evaporative Emissions (EVAP) Canister Purge Solenoid/Valve that you replaced?

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Customer reply replied 5 months ago
ok ty
Buick Mechanic: Ron, ASE Certified Technician replied 5 months ago

Do you have vacuum from the purge solenoid with the engine idling after a cold start with the connector unplugged.

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Customer reply replied 5 months ago
not sure about that.... how can I find out
Customer reply replied 5 months ago
if I do have vacuum what does that mean
Buick Mechanic: Ron, ASE Certified Technician replied 5 months ago

Unplug the connector and remove the hose and place your finger or it. There should be no vacuum with it unplugged and if there is then its stuck open.

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Buick Mechanic: Ron, ASE Certified Technician replied 5 months ago

While your checking the vacuum, also check and see if you have key on power to the pink power supply wire and let me know these results.

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Customer reply replied 5 months ago
ok so.... there is a vacuum when unplugged and cold start
Customer reply replied 5 months ago
the other u suggested I'm not sure what that means I'm sorry I'm a female trying to get my van working right
Customer reply replied 5 months ago
we did replace that part about 2 years ago... could there be something going on with the line.
Buick Mechanic: Ron, ASE Certified Technician replied 5 months ago

There should not be any vacuum coming through it with the connector removed and the engine running and if there is then that means its stuck open. Was this a new Canister Purge Solenoid/Valve that you replaced?

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Customer reply replied 5 months ago
it was the new one
Buick Mechanic: Ron, ASE Certified Technician replied 5 months ago

Well if you have done your testing right with it unplugged that indicates its defective.

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Customer reply replied 5 months ago
now if we replace this and still having problems any more ideas...
Buick Mechanic: Ron, ASE Certified Technician replied 5 months ago

The purge solenoid is an on /off solenoid and it gets its power from the fuse #10 located in the under hood fuse panel and the computer controls it with the ground signal from it on the green/white wire. If your circuit is okay and the solenoid is off when its suppose to be then there really is nothing else that will set the Code P0496.

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