What is SPN 6:
SPN 6 indicates an issue with the Engine Coolant Temperature Sensor Circuit. The ECM has detected that the signal from the sensor is outside of the expected range, potentially leading to incorrect temperature readings, which can result in engine overheating or improper engine operation.
Why This Happens:
- Faulty coolant temperature sensor.
- Damaged or shorted wiring in the sensor circuit.
- Corroded or loose sensor connectors.
- Low coolant levels affecting sensor performance.
- ECM failure to interpret the sensor’s signal.
How to Fix It:
- Inspect the coolant temperature sensor for damage or malfunction.
- Test the sensor’s voltage and resistance to ensure proper function.
- Check the wiring and connectors for visible damage, corrosion, or loose connections.
- Replace the faulty coolant temperature sensor if necessary.
- Ensure that the coolant system is functioning properly.
How to Avoid It Before It Happens:
- Regularly inspect the coolant temperature sensor and wiring.
- Keep connectors clean and corrosion-free.
- Maintain proper coolant levels and monitor coolant system performance.
- Perform diagnostic checks to ensure sensor accuracy.
- Clue’s Equipment Maintenance services proactively monitor coolant systems and prevent potential issues before they affect engine performance.
