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How Do I Access Engine Codes for an 89 Volvo 240

You can access engine codes for your 1989 Volvo 240 from your home garage using an OBD I scanner. This hand-held computerized tool can be purchased from any auto parts store. The On-Board Diagnostics computer receives and stores error codes sent to it from the engine. Sensors in the engine detect malfunctions and servicing needs of the Volvo and send the error codes to the computer. The computer, in turn, illuminates the "Service Engine Soon" or "Check Engine" lights on your instrument panel. The codes can be read using an OBD I scanner. After you read the codes, this same tool can be used to reset the computer and turn off all warning lights after repairs or servicing has been accomplished.

Instructions

1

Plug the OBD I scanner into the large open port on the drivers side dashboard underneath the steering column.

2

Put the key into the ignition, and turn it to the "ACC" position, but dont crank the engine. Wait while the scanner turns on. Some scan tools have an on/off switch that needs to be turned on.

3

Select the "Read Codes" command from the scanners menu. Wait for the scanner to interface with the OBD computer. Write the engine codes it displays on a piece of paper.

4

Unplug the scanner.

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