Knock Sensor and EGR Valve fix

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eletro - 29 Jul 2008 22:23 GMT

Hello,

I have a 1998 Nissan Altima. The Service Engine Light is on. I got it
checked and was told that 2 codes showed up. One is for a knock sensor
and the other is for a EGR Valve. How can I replace the knock sensor
myself? What tools would be necessary for the replace this sensor and
to clean or repair the EGR valve?
Would it be much easier to have a mechanic do the job? If so how would
be average labor charge for this job?

Thanks any assistance would be greatly appreciated.

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e.meyer - 30 Jul 2008 15:10 GMT

> Hello,
>
[quoted text clipped - 11 lines]
> Posted at author's request, using moderatedhttp://www.AutoBoardz.cominterface
> Thread archive:http://www.AutoBoardz.com/Knock-Sensor-EGR-Valve-fix-ftopict248337.html

Ignore the knock sensor and go after the EGR. The knock sensor is a
red herring. It does not turn on the engine light by itself.

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NissTech - 31 Jul 2008 02:06 GMT

And remember,
the diagnostic code does not always point to the component that is
malfunctioning, it usually refers to the "system".

So merely replacing the EGR valve might not fix it, but gaining knowledge of
the EGR system and its components and how the code is set is worth so much
more. It could be something as simple as a cracked vacuum hose or one of 3
other components misreporting it's info the the ECM.

Your job Mr.Phelps is to find out which one...

This message will self destruct in 5 seconds.....

On Jul 29, 4:23 pm, eletro <n...@000.com> wrote:

> Hello,
>
[quoted text clipped - 13 lines]
> Thread
> archive:http://www.AutoBoardz.com/Knock-Sensor-EGR-Valve-fix-ftopict248337.html

Ignore the knock sensor and go after the EGR. The knock sensor is a
red herring. It does not turn on the engine light by itself.

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