1. Check the Oxygen Sensor:
- Locate the oxygen sensor on the exhaust manifold. It is usually located near the catalytic converter.
- Inspect the sensor for any visible damage or corrosion. If the sensor is damaged, it will need to be replaced.
2. Test the Oxygen Sensor:
- Disconnect the electrical connector from the oxygen sensor.
- Using a multimeter, measure the resistance between the sensor's terminals. The resistance should be between 10 and 20 ohms.
- If the resistance is not within this range, the sensor is faulty and should be replaced.
3. Check the Wiring:
- Inspect the wiring harness that connects the oxygen sensor to the vehicle's computer.
- Look for any loose connections, damaged wires, or corrosion.
- Repair or replace any damaged wiring as needed.
4. Check the Computer:
- In some cases, a faulty computer can cause an oxygen sensor code.
- To test the computer, disconnect the battery and then reconnect it.
- If the code 44 reappears after doing this, the computer may be faulty and will need to be repaired or replaced.
5. Reset the Computer:
- If the problem persists, you may need to reset the vehicle's computer.
- To do this, disconnect the battery and then reconnect it after a few minutes.
- This will clear the computer's memory and may resolve the issue.
If the code 44 persists after trying these steps, it is recommended to take the vehicle to a qualified mechanic for further diagnosis and repair.
