What is CID 28:
CID 28 refers to an issue with the air intake temperature sensor. The ECM detects that the sensor’s signal is out of range, which can affect air-fuel mixture regulation, leading to engine performance issues, poor fuel efficiency, or increased emissions.
Why This Happens:
- Faulty air intake temperature sensor.
- Shorted or damaged wiring in the sensor circuit.
- Loose or corroded connectors.
- Environmental factors affecting sensor readings.
- ECM failure to interpret sensor data correctly.
How to Fix It:
- Inspect the air intake temperature sensor for damage or malfunction.
- Test the sensor’s voltage and resistance to ensure it is within specification.
- Check wiring and connectors for visible damage or corrosion.
- Replace the faulty sensor if necessary.
- Inspect the air intake system for any obstructions or contamination.
How to Avoid It Before It Happens:
- Regularly inspect the air intake temperature sensor and wiring.
- Keep connectors clean and free from corrosion.
- Perform diagnostic checks to monitor sensor data.
- Ensure the air intake system is free from contamination.
- Clue’s equipment maintenance services track air intake systems and prevent sensor issues before they affect engine performance.
