The problem could be:
* A faulty MAF sensor: This is the most common cause. The sensor itself might be dirty, damaged, or simply failing.
* Wiring problems: A broken wire, short circuit, or loose connection in the MAF sensor's wiring harness.
* Faulty connector: The connector that plugs into the MAF sensor might be corroded or damaged.
* Power supply issue: A problem with the power supply to the MAF sensor.
To diagnose the issue, you should:
1. Visually inspect the MAF sensor: Check for any obvious damage, dirt, or debris. Clean it carefully with MAF sensor cleaner (do not use anything else).
2. Check the wiring and connector: Inspect the wiring harness for any broken wires, loose connections, or corrosion. Clean the connector if necessary.
3. Use a multimeter: Test the MAF sensor's electrical connections to verify voltage and continuity. (This requires some electrical knowledge).
4. Consider a replacement MAF sensor: If the above steps don't reveal the problem, a failing MAF sensor is the likely culprit. Replacing it is often the most efficient solution.
Remember that a code reader (even a cheap OBD1 scanner for your car's year) can only give you a starting point. You'll likely need to perform some troubleshooting to pinpoint the exact cause. A Haynes or Chilton repair manual for your specific car model will provide helpful diagrams and detailed instructions.
