The check engine light comes on after the car runs for 2 or 3 miles. I ran a diagnostic test on it came up with five flashes it says I have two knock sensor on my car one for each side how do I move them and how do I know which side is out
If you had a better machine it wold tell you which side, bu tthe cheaper ones dont. Most pro models do. They unscrew like a bolt or have abolt holding them in. They may be in awater jacket however so watch for coolant leaks.