Several things can cause this:
* Faulty MAF sensor: This is the most common cause. The sensor itself might be dirty, damaged, or failing.
* Dirty air filter: A clogged air filter restricts airflow, leading to a low reading from the MAF sensor.
* Vacuum leaks: Leaks after the MAF sensor can also cause a low reading because less air reaches the sensor than actually enters the engine.
* Wiring issues: Problems with the MAF sensor's wiring harness (loose connection, short, broken wire) can interfere with the signal.
* Intake leaks: Leaks before the MAF can also affect readings.
Troubleshooting Steps:
1. Check the air filter: Replace it if it's dirty. This is the easiest and cheapest thing to try first.
2. Inspect the MAF sensor: Look for visible damage (dirt, debris, oil). Clean it carefully with MAF sensor cleaner (never use anything else, as it can damage the sensor). Do not touch the sensor element with your fingers.
3. Check for vacuum leaks: Inspect all vacuum hoses and connections for cracks or loose fittings, especially after the MAF sensor.
4. Inspect the wiring: Check the MAF sensor wiring harness for any damage, loose connections, or corrosion.
5. Have the MAF sensor tested: A professional mechanic can test the sensor to determine if it's functioning correctly. They can also perform a more comprehensive diagnosis to check for vacuum leaks or other issues.
Ignoring this code can lead to poor engine performance, rough running, and even potential damage to the engine. It's best to address the problem as soon as possible.
