# Knock sensor on 2003 Nissan Xterra

**URL:** <https://community.cartalk.com/t/knock-sensor-on-2003-nissan-xterra/26935>\
**Category:** Maintenance/Repairs\
**Created:** [February 24, 2009, 11:35pm UTC](https://community.cartalk.com/t/knock-sensor-on-2003-nissan-xterra/26935 "2009-02-24T23:35:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![aghaafshin](https://avatars.discourse-cdn.com/v4/letter/a/258eb7/32.png) [@aghaafshin](https://community.cartalk.com/u/aghaafshin)\
**Post date:** [February 24, 2009, 11:35pm UTC](https://community.cartalk.com/t/knock-sensor-on-2003-nissan-xterra/26935/1 "2009-02-24T23:35:22Z")

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so just got this 2003 nissan xterra, 4x4, V6, 5-speed, SWEET truck, but is showing a pending code, knock sensor  
  
 1) should i care, because the check-engine light is not on?  
  
 2)what exactly does a knock sensor do?  
  
 3)the cost to repair (need to take out the intake…EEEEEEEEE…) is around $800! i may be able to do it myself…but…