How to Check the Codes on a 1994 LeSabre

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If you want to perform your own repairs on your 1994 Buick LeSabre, you will need to properly identify the problem. The '94 LeSabre has a system called On Board Diagnostics (OBD) that uses codes to tell the mechanic where the problem lies. Unfortunately, 1994 was a transition year between OBD-I and OBD-II standards, so standard readers do not work with this vehicle. If you do not want to take the car to a GM service center to have the codes read, you will need to improvise.

Things You'll Need

  • Non-coated paper clip
  • Unbend the paper clip into a "U" shape.

  • Locate the diagnostic port on your 1994 Buick LeSabre. It is located under the dash on the driver's side. The diagnostic port contains 16 pins in two rows of eight.

  • Insert the bend of the paper clip between pins five and six. They are not marked. Begin at the left on the top row, and count over five pins.

  • Insert the key into the ignition and turn it back until it clicks. The check engine light will blink in a specific pattern--a series of blinks with short pauses, followed by a longer pause, then another series of short blinks. Write down the numbers produced by the blinking check engine light. For example, if it blinks twice, followed by a pause and four blinks, write down "24." The OBD system will repeat each code three times before giving you the next number. Each number corresponds to a diagnosis, which can be found in your service manual.

References

  • "Buick, Oldsmobile and Pontiac Full-Sized Models 1985-2002"; Mike Stubblefield; 2003
  • Photo Credit Gold paper clip image by Tomislav from Fotolia.com
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