Equus 3130 Saved its cost, first time I used it

In Chicago some car dealers charge $99.99 to read your codes before they repair your car (check engine light) I used this and after I found out what the code meant I took the car to someone to fix just the oxygen sensor. Savings, about $150.00. I travel around the country a lot, this device will go a long way toward keeping me from getting ripped off from auto mechanics.