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I have a 2003 chevy siverado 2500 hd and knock sensor code is on but truck runs smooth what should i check before taking it to dealership

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Hi, the knock sensor helps the computer optimize ignition timing and yet avoid detonation. When the sensor fails, the computer defaults to a timing that is less fuel efficient. Replacing a knock sensor is usually easy, provided there is access under the engine. Depending on which engine you have, it's usually centered on the block just below the cylinder head. There is one sensor on each side, and the trouble code should have indicated bank 1 (driver's side) or bank 2 (passenger's side).
Please let me know if you have more questions, and thanks for using FixYa.

Typical knock sensor:

i have a 2003 chevy - jturcotte_370.jpg

Posted on Mar 28, 2011

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Posted on Jan 02, 2017

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