Professional diagnositic tools or auto parts store

The best way to Troubleshoot a 1998 Cadillac DeVille 1Find the location of the OBDII port by feeling about the location beneath your Deville's steering wheel. The port will likely be placed in the location above where your suitable knee would sit if you were sitting within the driver's seat. It is actually rectangular in shape and will be about two inches wide by three quarters of an inch in height.2Plug the OBDII code scanning tool into the OBDII port and power the scanning tool on.3Insert the important to your Deville in to the ignition and turn the ignition to ensure that either the engine is idling, or when the engine will not begin, towards the position just before the engine starts. Either will activate the car's electronic system and prompt the code scanning tool to start its error code scan.4Take note of the error codes that appear on the display of the code scanning tool because the code scan is performed.5Determine what the error codes signify by bringing the list to a neighborhood dealership car diagnosis tool, repair shop, or auto parts retailer Professional diagnositic tools, all of whom will have reference components that may let you know what each error code represents. You can also perform a net search making use of a search engine to establish what parts are failing by seeking up each error code. Related articles: