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…