Car sounding like a vacuum and check engine codes

  • 2009 PONTIAC G6
  • 2.4L
  • 128,000 MILES
My check engine light is on. I took car to Auto Zone to check codes. I have 2009 Pontiac G6. I purchased a gas cap when I purchased car. I've had a catalytic converter fixed in early 2013. I hope this is enough detail. My car is making a sound similar to a vacuum turned on when it's moving. Sometimes it's loud (can hear over radio) Both when pressing accelerator or just letting it go. It also takes time increasing speed. Like it doesn't want to go. Codes that's showing: P0449, P0420, P0013, P0442, P0014, P0068, and P0455. If you need detailed list of each I will provide upon request. Thanks so much.
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Tuesday, August 12th, 2014 AT 9:04 PM

1 Reply

Wow. You got all kinds of codes. The most prominent one deals with the EVAP system. So for starters, I feel it would be a good idea to have the EVAP system smoke tested. We first need to find the leak. Once that is found, chances are most of the codes will go away.

After that, check to make sure there are no obstructions in the air intake system or leaks there. Since you hear a vacuum sound, it leads me to believe the air intake hose, which runs from the air filter box to the throttle body, is disconnected. Check that.

Finally, once we get those two issues out of the way, we then need to focus on the exhaust cam sensor issue.
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Tuesday, August 12th, 2014 AT 9:45 PM

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