Service Engine Soon! Question

[duketter]

2001 Chevy Tahoe 5.3 liter - 71000 miles.

My service engine light came on a couple weeks back. So I went to my local auto parts store and borrowed a code scanner. I pulled the code it said something like knock sensor 2 low circuit back bank. Something like that. Anyways I reset the code using the scanner and my check engine soon light hasn't came back on. My question is, do you think I need to replace that knock sensor or was it a false code? Just curious as I am thinking since I reset the light it should come back on if it is a faulty sensor? Or am I doing more damage? I would imagine the check engine soon light should come back on if there is a problem? I would say I reset the code at least 2-3 weeks ago and it still hasn't come back on. You think I am good to go?

I did call the dealer at the time and they qouted me around $450 to change both knock sensors. Fair price if I need this done?

Thanks everyone!

 

[Nappers]

If memory serves they are located under the intake manifold.

If it were me, and I'm no expert, run some seafoam through the engine (1/3 thru brake booster line), put some in the gas tank (1/3 in tank) and I run the other 1/3 in the oil and have no problems (knock on wood). I have 124,000+ on the clock.

They are easy to replace, or so I'm told but removing intake and all of that junk, may be a bargain. Depends what the book calls for on the labor. If they are going bad, I would probably have someone do it as I don't have too much patience with the intake manifold

I've reset the light on my Yukon and didn't suffer ill effects, if the problem is still there it would have come back on. You could have had a bad tank of gas, or something to make the knock sensors trip......haven't read enough on those yet to give an accurate answer, but I'm sure if it's bad, it would trip a light very fast. My engine light was the 2nd AIR injection valve. I reset it and it came back on (strangely everytime when I went to my in-laws.....) I bought a new one and fixed it.

I don't think you would do damage by turning it off.

Aaron