Chevy Cavalier Engine Code Troubleshooting

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The computer in the Chevrolet Cavalier stores codes and turns the check engine light on when one of the sensors malfunctions. The engine light alerts the driver to a problem, as not every sensor malfunction causes the vehicle to run poorly. You need a scanner to extract the codes from the computer, which you can find at most auto parts stores. The scan tool comes with a code sheet that lists the codes for each type of vehicle.

Things You'll Need

  • Code scanner
  • Plug the code scanner into the data link port under the driver side dash, just to the left of the steering column.

  • Turn the key to the "Start" position. Press the "Read" button on the scanner. The scanner will read the codes and display them on its screen. Write the codes down. Turn the key to the "Off" position.

  • Cross-reference the codes to the code sheet. Repair the problem sensor or sensors.

  • Plug the code scanner in, if you unplugged it earlier. Turn the key to the "On" position. Press the "Erase" button on the scanner to erase the codes.

  • Test drive the vehicle. If the engine light comes back on, repeat the procedure.

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