Mar 19 2008
How Do I Scan Codes on My Car
Question:
I have a 1998 Buick Century and the check engine light is on. My friend said I didn’t need a scan tool to get the codes. So, How do I get the codes for the check engine light??
Answer:
Your friend is correct. You do not need a scan tool to extract the codes for your car. You just need a jumper wire or paper clip. Locate the ALDL (Assembly Line Diagnostic Lead). It is usually under the drivers side of the dash. It may have a cover over it, and may even say “Diagnostic Connector”. This is the ALDL. The two terminals that you need to be concerned with is in the picture. It is terminals “A” and “B”. Simply turn the Ignition to “Run” (Do not start the vehicle) and put the paper clip in the two terminals. Now watch your CEL. It will start flashing. It will look like Morse Code, but it isn’t, and is real easy to interpret. Detailed information and code definitions.
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