C302 OBD2 Scanner Code Reader for Car Check Engine, Automotive CAN Diagnostic Tool, Read and Erase Fault Codes, Check Emission Status, Universal for All OBD II Protocol Cars After 1996

Works! Detects basic codes and has other basic functionality. Good, cheap insurance for used car buying.

This inexpensive auto diagnostic tool gave me the lead that solved a nine month question mark. No codes were generated but when one did generate and shortly after that another, I was as finally able to start to track down the source of my rough idle issue. P0301 misfire in cylinder one. Google search came up with a list of possible solutions and then I found the cure from a fellow home taught mechanic. A bad coil pack which I ordered from Amazon for $20 and problem solved! Without the code reader I would not have had constant access to checking for codes. Well worth the price!

Nothing special works as intended

It does what it says it does

Accurate reading compared to the high end ones at the auto shops.