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Discussion Starter #1 (Edited)
code 1225 # 1 knock sensor

I am getting this code but only once in a while. Usually when going down a hill the check engine light will come on but only for a second or two.

I read up on it and the 1st sensor is all the way back next to the fire wall.

BUT do I really need to change it, can I leave it or should I replace it.
Just wondering if it is a vital sensor that I should change or if it’s something I can look over.
Thanks
 

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I had a code like this and it ended up being worn out spark plugs causing the engine to knock once in awhile. I would change them first.
 
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