P0704 Clutch Switch Input Circuit Malfunction - LS1TECH

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P0704 Clutch Switch Input Circuit Malfunction

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Old 01-16-2008, 11:14 AM   #1
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Default P0704 Clutch Switch Input Circuit Malfunction

Anybody know how to fix this code i searched some old threads and found out that its like a 20 dollar chip that goes under the dash somewhere but idk where to find it (at autozone they said they dont carry them) and i dont know exactly how to install it.
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Old 01-17-2008, 07:22 PM   #2
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nobody?
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Old 01-17-2008, 07:40 PM   #3
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I have never had the problem so I cant tell where its located. Although I can tell you that you can pick the part up at local Chevy or GM dealership with a parts department.
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Old 01-18-2008, 09:43 AM   #4
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ya thats what i guess ill do go to the dealership, any other opinions?
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Old 01-18-2008, 12:08 PM   #5
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Before you change anything, see if your cruise control works. If it doesn't it is likely the switch for the cruise control. It screws in and tends to work its way out. It's probably out of adjustment. I got that code for ever. I changed the neutral safety switch out and it kept coming back. Somebady told me about the cruise control switch. I adjusted it and the code never came back.
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Old 01-18-2008, 07:16 PM   #6
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its funny you mention that becase on the cruise control doesnt work, it was like that since i bought it 3 weeks ago and the light came on last week, so where is the screw i can tighten?
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Old 03-21-2008, 01:00 AM   #7
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ya where is the screw?
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Old 05-23-2009, 11:59 AM   #8
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Quote:
Originally Posted by binks0678 View Post
Anybody know how to fix this code i searched some old threads and found out that its like a 20 dollar chip that goes under the dash somewhere but idk where to find it (at autozone they said they dont carry them) and i dont know exactly how to install it.
Have you figured out this one yet? I'm asking because i got this code also.
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Old 05-23-2009, 09:57 PM   #9
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TTT, peeps.
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Old 05-25-2009, 10:51 PM   #10
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mine threw that code and the gm guys said it could be anything from a switch all the way up to the ecu. i did some looking and found out that it is a little switch mounted close to where your master cyl connects to the clutch petal, i screwed it in because it appeared to be not making contact with the petal. after i tried that, my cruise worked and it did not throw the code again.
hope that helped
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Old 05-26-2009, 05:47 PM   #11
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mine threw that code and the gm guys said it could be anything from a switch all the way up to the ecu. i did some looking and found out that it is a little switch mounted close to where your master cyl connects to the clutch petal, i screwed it in because it appeared to be not making contact with the petal. after i tried that, my cruise worked and it did not throw the code again.
hope that helped
Thanks, for the response.
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Old 04-30-2010, 08:35 PM   #12
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I have the same code. I still have to check to see if maybe the cruise control is working or not.

Here is a picture of it. Its located right behind the clutch pedal

Would my car pass inspection with this code?

Im thinking that I am going to have to replace it. Does anyone know how it is held in place? Hopefully it wont be too difficult or time consuming
Attached Thumbnails
P0704 Clutch Switch Input Circuit Malfunction-img_3303.jpg   P0704 Clutch Switch Input Circuit Malfunction-2008-09-22_231317_1b.gif  
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Old 05-25-2010, 10:05 PM   #13
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that switch that is circled is not the one that needs to be replaced. that is the switch that will allow the car to start. below that circle is the metal bar on the clutch pedal that hits that switch and the switch below that. the bottom switch needs to be pressed in when the clutch pedal is not being pressed down. i think i solved the problem. I have that switched adjusted as far out as i can. It needs to be pressed in more. I am thinking of getting a stick on wheel balancing weight and attaching it to the pedal bar. Doesnt sound like a bad idea right?
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Old 05-25-2010, 10:25 PM   #14
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^I'm not a big fan of repairs using tape, but this might work. For a while.

Is there a bracket that could be bent to give a little more adjustment?
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Old 05-31-2010, 11:16 PM   #15
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If somebody can get a pic of the screw that needs to be tighten that would be great. My T/A just started throwing that code after i had my heads done and i have not had cruise control for a while. I hope this want hurt the car while driving it like this
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Old 06-01-2010, 08:15 PM   #16
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look at the left thumbnail pic that pewtermadre posted. just below the circle is a white switch. you can see the threads on the neck of it
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Old 07-10-2010, 01:06 AM   #17
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metallicsniper is right. I have posted some more pictures. is it the white screw like thing (circled in blue)? How does it screw in?
Attached Thumbnails
P0704 Clutch Switch Input Circuit Malfunction-img_3295.jpg   P0704 Clutch Switch Input Circuit Malfunction-img_3305.jpg   P0704 Clutch Switch Input Circuit Malfunction-img_3304.jpg   P0704 Clutch Switch Input Circuit Malfunction-img_3304b.jpg  
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Old 07-11-2010, 10:08 PM   #18
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there are two little white tabs that hold that switch to the bracket. Squeeze them together and then pull the switch off the bracket. then twist the end it will get longer or shorter depending on which way you twist it, then push it back in. its as simple as that.
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Old 07-16-2010, 02:59 PM   #19
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I just did it and the code is gone! I have posted some pictures of the switch before and after adjustment.

Like Metallicsniper mentioned:

Step one: You simply remove the switch (white) from its connection as pointed out in the pictures.

Step two: Once you have done this twist the switch into position. Then you re-connect it to its connection and you are done. Clear the code and it should go away for good.
Attached Thumbnails
P0704 Clutch Switch Input Circuit Malfunction-img_3295b.jpg   P0704 Clutch Switch Input Circuit Malfunction-img_3304.jpg   P0704 Clutch Switch Input Circuit Malfunction-img_3304b.jpg   P0704 Clutch Switch Input Circuit Malfunction-img_3306b.jpg   P0704 Clutch Switch Input Circuit Malfunction-img_4193b.jpg  

P0704 Clutch Switch Input Circuit Malfunction-img_4197b.jpg  

Last edited by 01PewterMadre; 07-16-2010 at 03:14 PM..
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Old 07-22-2010, 02:10 AM   #20
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When I bought my current car, I had this same problem, same code.. The guy driving it down to me said it had no cruise control. I did some searching (on LS1tech ) and found the culprit. I looked under the clutch pedal, and the little white switch was just dangling. The bracket/clip was broken and would not be able to hooked back up stock. So i creatively used a ziptie to hold it into place. Have not had an issue since.
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Old 07-22-2010, 02:10 AM
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