The code was p0641?

2008 CHEVROLET IMPALA
200,000,000 MILES • 3.9L • 6 CYL • 2WD • AUTOMATIC
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MERE
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Okay, so, I think I found the problem but my previous wires are red/black and brown and white but my new wires are just red/black and white can I still use without the brown stripe?
Dec 6, 2024 at 11:07 AM
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The P0641 diagnostic trouble code indicates an issue with the 5-Volt Reference 1 Circuit. Can I ask what the connector goes to? That way I can get the wiring diagrams for repairs.
Dec 6, 2024 at 11:12 AM
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MERE
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I know what the colors are I just want to know about the wires it goes to my camshaft sensor all 3 of them wires busted up all the way to the connector so I was going to replace the whole wire but I want to know if I can use the new wire because the one that’s supposed to have a brown line doesn’t it’s just white.
Dec 6, 2024 at 11:19 AM
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MERE
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I got codes read it, said something about the crankshaft sensor and oil pressure sensor. so, I changed them still nothing. then it said something about 5v reference sensor.
Dec 7, 2024 at 11:23 AM (Merged)
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Please give me the code numbers so I can help you. I can tell you that the limp mode can be caused by a bad throttle body or if it needs to be cleaned which you can try first.

Here are two guides to help us while you get me the code numbers:

https://www.2carpros.com/articles/reduced-power-limp-mode

and

https://www.2carpros.com/articles/throttle-actuator-service

Here is how to service the throttle body on your car. Check out the images (below). Please let us know what happens.
Dec 7, 2024 at 11:23 AM (Merged)
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MERE
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I have a couple of codes, here’s the video I’m going to go check the codes again when I get off work, I haven’t been driving car since then.
Dec 7, 2024 at 11:23 AM (Merged)
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Sounds good, I can't read the codes. Can you please list them in your post?
Dec 7, 2024 at 11:23 AM (Merged)
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MERE
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P2122
P0452
P0641
Dec 7, 2024 at 11:23 AM (Merged)
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STRAILER
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So the first code will cause the problem and the third code, let's try replacing the accelerator pedal sensor and then clear the codes.

P2122 - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low Input
P0452 - Evaporative Emission System Pressure Sensor/Switch Low Input
P0641 - Sensor Reference Voltage 'A' Circuit/Open

Here is how to replace the part in question. Check out the images (below). Please let us know what happens.
Dec 7, 2024 at 11:23 AM (Merged)
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MERE
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Okay, so I just checked the codes again it was p2228/ p0107/p0452/p0523/p0641.
Dec 7, 2024 at 11:23 AM (Merged)
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So now there is no P2122 code?
Dec 7, 2024 at 11:23 AM (Merged)
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MERE
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No only have those and for some reason my car die extremely fast it was at 12v checked the alternator and it went to like 14v but I started a timer to let the computer shut down and literally 16:21. Minutes the car was dead had to jump it.
Dec 7, 2024 at 11:23 AM (Merged)
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STRAILER
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Please start a new thread with the new codes.
Dec 7, 2024 at 11:23 AM (Merged)
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MERE
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I did I think I found problem I just want to know about the wiring.
Dec 7, 2024 at 11:23 AM (Merged)
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STRAILER
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what wiring diagrams do you need?
Dec 7, 2024 at 11:23 AM (Merged)
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Here is the camshaft sensor wiring.
Dec 7, 2024 at 12:17 PM
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MERE
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I know I have that. thanks, though I cannot find what wire color the x100 connector is, any help on that?
Dec 7, 2024 at 12:19 PM
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Sure, can I ask what the connector plugs into? here is the x100 connector info. Check out the images (below). Please let us know what happens.
Dec 7, 2024 at 12:50 PM
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MERE
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I’m not even quite sure if that I just know the connection is bad the wire is corroded so I wanted to put a new one, but I don’t know what color it was.
Dec 7, 2024 at 1:48 PM
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MERE
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I think it’s a ground wire it connects near the starter, but I am not quite sure. it has a circle electrical connector with 3 other connections to it but separate, if that make sense.
Dec 7, 2024 at 2:15 PM
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MERE
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Would you happen to know what this plug is called? It’s a 16-pin right near the power steering pump.
Dec 8, 2024 at 8:09 PM
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STRAILER
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It must be a main engine wiring harness connector; can you tell me the colors of the wires so I can look them up? Thanks for the video, it helped.
Dec 9, 2024 at 8:46 AM
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MERE
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It’s like 16 colors lol I am going to try to check in a few. it’s raining. I see green, purple, black, white, red, probably got a whole rainbow there.
Dec 9, 2024 at 8:57 AM
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MERE
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Here’s the back of the connector if this helps.
Dec 9, 2024 at 2:25 PM
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Can you take a picture of the wires in the connector?
Dec 10, 2024 at 10:03 AM
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MERE
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Okay, so a bolt fell into my camshaft sensor hole I have to remove oil pan to get it out, correct? Ik I'm asking a lot of questions just a beginner. lol
Dec 10, 2024 at 10:25 AM
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The connector does not matter just the wiring colors which I can see, please take still shots that don't move around.
Dec 11, 2024 at 9:54 AM
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MERE
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Yes, that’s what I was talking about what wire goes where.
Dec 11, 2024 at 10:00 AM