Question about 2007 Volkswagen Jetta 2.5 Sedan

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Exactly same prob.

@ 3000 rpm (where it normaly would shift gears) engine just wont do anything. Have to back off to get it all going again. test code from VW mec. said knock sensor bad... original thread poster stated that knock sensor was replaced in his 4 times and still bad....was there ever a solution to the problem....just asking before i spend 50 bucks on a new sensor. thanks..

also the problem comes and goes.

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  • ryan karos May 11, 2010

    i would try to push it threw warranty if the vw mech had documented it and its already been replaced a couple times i would call vw

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99% of the time we mechanics tend to trust computer of what it tells us when it come to engine diagnostic; i hate to not agree with VW mech which he pull the code and state is knock sensor although I have ran into computer spit out many wrong code and still does not fix the problem however I go ahead and replace it any way. Now if that does not fix the issue after replacing with new parts, I then would go back and plug computer back in to see what other code it would spit out. my opinion, I would also have your air-mass flow sensor check, some people don't realized throttle control/airmass flow sensor also link into the ECU compute between the revolution sensor of the transmission telling computer is time to shift. faulty air-mass sensor can also cause it to bogs or not picking up speed giving a false sense the transmission is not working correctly. you can go to auto zone and use their computer for free if you need to re-pull the code after replacing the knock sensor.

Posted on Sep 25, 2009

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