check engine light and code P0496

2010 GMC ACADIA
140,000 MILES • 3.6L • 6 CYL • FWD • AUTOMATIC
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JAMES KINTON
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Hi, my engine light came on. I took it to my local auto part store the scanned it and p0496 code come up twice. I replaced fuel rail sensor an the purge valve. My engine light is still on. What else can I do? Trying to avoid taking to a mechanic. Please help
Oct 15, 2016 at 11:43 AM
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SATURNTECH9
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Where was the purge valve located you replaced?
Oct 15, 2016 at 1:09 PM
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JAMES KINTON
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In the front right side of engine.
Oct 16, 2016 at 12:19 AM
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JAMES KINTON
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Diverside.
Oct 16, 2016 at 12:20 AM
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JAMES KINTON
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  • 10 POSTS
Sorry to post so many. I know the purge valve was bad because it would not close. My engine light did go off for a day and the next morning came back on.
Oct 16, 2016 at 12:23 AM
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SATURNTECH9
  • ✓Experienced Mechanic
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It is common for the canister purge solenoid valves to stick open like that. What I would like to see is what the fuel pressure tank sensor is reading with the engine off gas cap off and the key in the run position. That would take a advanced scan tool with live data to read that. I have seen those fuel tank pressure sensors get stuck so it tells the computer there is vacuum to tank when there really is not.
Oct 16, 2016 at 1:36 AM
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