What is CID 71:
CID 71 refers to an issue with the engine coolant temperature sensor. The ECM detects an out-of-range signal from the sensor, which can lead to engine overheating, poor fuel efficiency, or potential engine damage.
Why This Happens:
- Faulty engine coolant temperature sensor.
- Shorted or damaged wiring in the sensor circuit.
- Loose or corroded sensor connectors.
- Low coolant levels affecting sensor readings.
- ECM failure to interpret sensor data correctly.
How to Fix It:
- Inspect the engine coolant temperature sensor for damage or malfunction.
- Test the sensor’s voltage and resistance to verify it is within specifications.
- Check connectors for tightness and cleanliness.
- Replace the faulty sensor if necessary.
- Ensure the cooling system is working properly and coolant levels are maintained.
How to Avoid It Before It Happens:
- Regularly inspect the engine coolant temperature sensor and wiring.
- Keep connectors clean and free from corrosion.
- Perform routine cooling system maintenance.
- Ensure coolant levels are maintained.
- Clue’s equipment maintenance services track coolant systems to prevent overheating and ensure optimal engine performance.
