trig42: Do these tools allow you to stop a code coming back?
I have a code that keeps coming up on my car - I have talked to people and done online research and the thing it pops up for is inconsequential to the running of the car (it is called a swirl control valve, and makes no difference to the running of the engine). I want to stop that code popping up without ripping the engine to bits and finding the valve. I can clear the code, but usually after a few days it comes back (engine light comes on).
No