- 1). Connect the scanner to the Cadillac's diagnostic system. The scanner itself has a large plug at the end of a cable, and it should fit into the Cadillac's diagnostic port. You can find this port on the driver's side, in the leg space in front of the car seat.
- 2). Turn on the scanning tool.
- 3). Start the Cadillac. The car's computer has to be up and running, or the OBD-II scanning tool will have nothing to interact with.
- 4). Wait for the diagnostic trouble code to appear on the scanning tool's screen.
- 5). Clear the code. Issuing this command should be a simple push of a button, but because scanners are all slightly different by brand, locating the exact button will require consulting the hardware's user's manual.
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