Knock sensor

[Crysis]

My check engine light keeps flashing on and off periodically for code "22...knock sensor on right side". I understand knock sensors allow cars to run on lower octane fuel, but other then that is it a big problem? Also, since it is flickering on and off does that mean it could be a faulty sensor?

[Earthworm]

If you want to test the sensor then swap the 2 knock sensors. If the problem follows the sensor you have your solution. If not you will need to look into why your engine is knocking.

[Crysis]

could it just be knocking due to a bad tank of gas...it was 93 though

[SVXRide]

the SVX's knock sensors will go bad over time -- usually mileage approaching 180k miles. Their casings will crack and the harness lead will get brittle and crack. By not replacing them, you're letting them tell the engine to pull back timing that, most likely, doesn't need to be pulled back - thus hurting engine performance.
-Bill

[Crysis]

Thanks.....got one more question Does the check engine light always come on for only a second if there is a problem?

[Earthworm]

It stays on as long as the problem is currently occurring.