Blog
What the codes actually mean, what the numbers say, and what to do about it — written for the person holding the scanner.
Before you book the garage, check the gas cap
A large EVAP leak code has one cause so common it is almost a cliche. Here is how the test works, why the cap matters, and how to tell a cap from a real leak.What a catalyst code really costs
P0420 is the second most common code we see, and the most expensive one people misdiagnose. Here is how the test works and why the converter is often the victim, not the culprit.Why a misfire code keeps coming back
P0300 is one of the most common codes we see. Here is what a random misfire actually is, what it usually costs to fix, and why ignoring it gets expensive.Read & clear your own codes
Scan your car, see what every code means in plain English, and clear it once it's fixed — with OBD DashX on your phone.