I think that every vehicle owner should have a scan tool, even if it only has the ability to pull codes. A code pulling scan tool can be obtained for $40
your vehicles check engine light provides a warning that something is not working as it should, this could be something minor, "usually the case". it could also be something more serious or going to lead to something more serious.
when the code or codes are known, a good repair shop will be willing to take your phone call, write down the codes you provide and let you know whether the vehicle is safe to drive or not.
if the repair shop is not sure whether its safe to drive or not, then its up to you to make a decision, the repair shop should let you know why they are not sure and what could result if the vehicle is continued to be driven.
Diagnostics with a scan tool, anyone can pull a code, its simple and easy, code does not always equal part, an example would be an EGR code such at P0401, the scan tool refers to the EGR Valve, an inexperienced person will replace the EGR Valve, The Vehicle will not be fixed and the vehicle will experience the same problem.
The shop will say, the scan tool said EGR Valve, when actually the scan tool didn't say anything, the scan tool only provided a code, along with a general area to diagnose. "code does not equal part".
A scan tool is only limited by the ability of the person looking at the information on the scan tool and the limitations of the scan tool itself.
We use the same Scan Tool the Dealerships Use, this is very important to think about, imagine someone having heart trouble, picture a doctors office with a stehoscope, now a doctors office that has an EKG Machine.
I do not know about you, but I would like to go to the location with the EKG Machine.
what connects to your vehicle is pretty much the same difference, its about how much information and capabilities a generic scan tool has to that of the real deal, the scan tool the Manufacturer made to connect to their vehicles.
