With vehicle turn off the electric power remains feeding the Throttle body?

2009 CHEVROLET CAPTIVA
120,000 MILES • 2.0L • 4 CYL • TURBO • 4WD • MANUAL
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ABAYA
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When i cut off the engine the electric power remains feeding the throttle body and i hear low whistling coming from the throttle body.
Please excuse my bad English.
May 14, 2025 at 9:25 AM
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ABAYA
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Hi,
I want to add that the engine starts and accelerates without any difficulty. But every morning I find the battery drained.
Thank you, sir.
May 15, 2025 at 12:17 AM
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STRAILER
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Can you upload a short video of the noise so I can hear it? You can upload it here with your response.
May 16, 2025 at 10:01 AM
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ABAYA
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Hi,

Sorry, the sound coming out from the throttle body is very low.it seems that the electric motor is unable to close the throttle body gate. But when I take off the battery negative wire, the gate gets closed.
Excuse my bad English Mr. Ken
Thank you very much.
May 17, 2025 at 12:18 AM
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STRAILER
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No problem, I would unplug the throttle body to see if the noise goes away and if so, replace the throttle body. Thanks for the video, it helps.
May 18, 2025 at 5:43 PM
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ABAYA
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Thank you Mr. Ken.
It's exactly like what you said.
It's helpful.
May 18, 2025 at 10:07 PM
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STRAILER
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Together we can fix it! :)
May 19, 2025 at 9:36 AM
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ABAYA
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Hi.
Today i'll replace a new throttle body.
I'll let you know the result.
May 20, 2025 at 8:13 PM
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STRAILER
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Sounds good, thanks for letting me know.
May 22, 2025 at 9:56 AM
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ABAYA
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Hi. Mr .Ken
Is a bad reprogrammation of the ecu can lead to this problem?
I must say that the engine run normally .
May 22, 2025 at 2:28 PM
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STRAILER
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Yep, I can't count how many times reprogramming fixed strange issues. Can I ask what problems remain?
May 23, 2025 at 11:05 AM
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ABAYA
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Hi, mr. Ken
Is a bad reprogrammation can led to the problem I encounter in the throttle body ? My throttle body remain open after turning off the engine.
May 23, 2025 at 11:14 AM
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STRAILER
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That can be normal as long as it closes on start up.
May 23, 2025 at 11:41 AM
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ABAYA
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Thank mr. Ken
But it remains open after I cut off the engine.
May 23, 2025 at 12:11 PM
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STRAILER
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Yes, this is to allows gas fumes to dissipate, I think it is normal but you can try a new part and see if it does the same thing.
May 23, 2025 at 1:03 PM
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ABAYA
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Thank you
May 23, 2025 at 1:57 PM
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STRAILER
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You are welcome, have a great weekend!
May 23, 2025 at 4:09 PM
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ABAYA
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Thank you very much.
May 25, 2025 at 8:11 AM