What is CID 901:
CID 901 refers to a problem with the vehicle's air intake system, specifically with the mass air flow (MAF) sensor. The ECM detects that the sensor is malfunctioning, leading to incorrect air-fuel mixture, poor engine performance, or reduced fuel efficiency.
Why This Happens:
- Faulty mass air flow (MAF) sensor.
- Shorted or damaged wiring in the sensor circuit.
- Loose or corroded connectors.
- Blockages in the air intake system.
- ECM misinterpretation of the sensor’s data.
How to Fix It:
- Inspect the mass air flow (MAF) sensor for damage or malfunction.
- Test the sensor’s voltage and resistance to ensure proper operation.
- Check wiring and connectors for visible damage or corrosion.
- Replace the faulty sensor if necessary.
- Inspect the air intake system for blockages or contamination.
How to Avoid It Before It Happens:
- Regularly inspect the MAF sensor and wiring.
- Perform routine air intake system maintenance.
- Keep connectors clean and free from corrosion.
- Perform diagnostic checks to monitor sensor performance.
- Clue’s equipment maintenance services help monitor air intake systems and prevent sensor issues before they affect engine performance.
