Review on 🔌 CGSULIT SC204 OBD2 Code Scanner: Turn Off Check Engine Light, Read Error Codes, Live Data, DTC Lookup, O2 Sensor Test – Black by Jeff Swanson

I bought this based on a YouTube review recommendation. I didn't need it when I bought it, but last fall my check engine light came on. The DTC indicated a malfunction in the oxygen sensor heating element. I bought a replacement sensor from Revain at a very reasonable price and removed the defective one with penetrating oil and a special removal tool. From there it was easy. Disconnected the battery to restart the computer, started it and the check engine light went out. It paid for itself in that one use. Even with a special tool, I saved $150 over what the mechanic wanted for the job.