Repair 7

How to Reset a Trouble Code on a 1993 Volvo 850

You can reset the trouble codes on your 1993 Volvo 850 right from your home garage, saving time and money. The On-Board Diagnostics I computer (OBD I) receives and stores trouble codes sent to it from sensors positioned throughout the car. The computer alerts you to any malfunction or service need by illuminating a warning or service light on the instrument panel. After the scan tool reads the codes, and after you have had the vehicle serviced or repaired, then you or your mechanic can reset the trouble codes by using the same OBD I scan tool.

Instructions

1

Located a port on the lower part of the drivers side dashboard near the hood release handle. This port should be the same size and shape as the connector on the OBD I scan tool. Plug the scan tool into this port.

2

Put the key into the ignition and turn it to the "On" position, but dont start the engine. This will turn on the scan tool.

3

Wait for the scan tool to read the trouble codes. Look for a command that says "Delete Codes" or a similar command. Select this command. Wait for the scan tool to complete the task. It will indicate that it has finished by displaying "Command Sent" or it will return you to the main menu. Scan tools vary a bit according to which company manufactured it.

4

Unplug the scan tool and turn on the engine. Verify that all warning and service lights have shut off of the instrument panel.