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How you can Troubleshoot a Service Engine Soon Light Pulling "Check Engine" Light Codes having a Scanner1Locate the test port hyperlink under the dash, also referred to as the Assembly Line Diagnostic Link (ALDL). It's a compact, 12-16 point electrical port and it might possess a plastic cover car diagnostic tool.2Plug the scanner in to the test port and turn the ignition crucial into the "On" position.

The dash panel lights and radio will come on but the engine won't be cranked.3Answer the prompts on the scanner screen to identify the make, model and year of one's automobile. Pick the option to pull the "Service Engine" codes.Other Procedures for Pulling "Service Engine" Codes4Turn the ignition essential on, then turn on and off quickly in this succession: on, off, on, off, on. Finish together with the key in the "On" position. Watch the "Check Engine" light. It's going to flash a series of occasions to indicate difficulty codes stored within the computer system.

For instance, Code 23 will flash this way: flash, flash, pause, flash, flash, flash. Consult your owners manual to discover what the codes mean or click the provided hyperlink.5Locate the ALDL beneath the dash. For those who have a 12 pt. ALDL port automotive diagnostic tools, you may connect ports "A" and "B" to begin the diagnostic sequence. Use a jumper wire or an unbent paper clip to connect the ports and watch the "Check Engine" light for codes. This process will not work on 16 pt. ports.6Turn the essential on and depress the odometer trip and reset buttons in the identical time. Codes read from the odometer display in automobiles with digital dash clusters.