Troubleshooting a Check Engine Light on 2000 Ford Focus

The Ford Focus was first introduced in the United States in 2000.

The check engine light on all variants of the 2000 Ford Escort turns on when the vehicle's onboard diagnostics detect an out-of-specification sensor reading. If the light is on but not blinking, the emissions are beyond 1 1/2 times the normal readings, indicating that the driver should diagnose and repair the problem as soon as reasonably possible. If the light is flashing, the onboard computer is indicating a problem requiring immediate attention. Trouble codes for all 2000 Ford Escorts are retrievable from the onboard computer.

Things You'll Need

• OBD-II scanner or code reader

Instructions

1. Turn off the Ford Focus engine and remove the key from the ignition.

2. Attach the OBD-II tool's cable to the OBD-II port. The 16-pin connection is under the driver's dash, at the far left near the door.

3. Initialize or turn on the OBD-II reader. If necessary, indicate the manufacturer of the vehicle as "Ford." Place the key in the ignition and turn it to the "Start" position but do not turn on the vehicle.

4. Allow the data to transfer to the code reader. Monitor the reader and follow any on-screen instructions required to retrieve the trouble codes from the onboard computer. Specific steps vary by device. Consult the owner's manual, if necessary, for exact steps.

5. Read any trouble codes and information displayed on the reader. Some OBD-II scan tools provide both the code and diagnostic information. Others display only the code, requiring you to use the owner's manual or access the OBD website for interpretation.

Tips & Warnings

• If you do not have a scan tool, many automotive parts stores provide the use of one, at the store's location, for free or a nominal charge. If the scanner doesn't display the definition for the code, the store will have the list of codes and meanings.

• If the check engine light is flashing, do not drive the vehicle more than absolutely necessary to position it in a safe place. Early detection and repair of failure can prevent costly additional repairs.

References

• OBD Clearinghouse: 2000 Ford Focus OBD II Port Information
• OBD II: On-Board Diagnostic System

Resources

• OBD II: Ford Driving Cycle
• Service Mix: Performance Tuners & Programmers