What is SPN 200:
SPN 200 refers to a problem with the Crankshaft Position Sensor. The ECM has detected an abnormal signal from the crankshaft position sensor, which can cause issues with engine timing and result in stalling, misfires, or failure to start the engine.
Why This Happens:
- Faulty crankshaft position sensor.
- Damaged or shorted wiring in the sensor circuit.
- Loose or corroded sensor connectors.
- ECM failure to interpret the signal from the sensor.
- Mechanical issues affecting the crankshaft position readings.
How to Fix It:
- Inspect the crankshaft position sensor for visible damage or malfunction.
- Check wiring and connectors for any visible damage or corrosion.
- Test the sensor’s voltage and resistance to ensure it is functioning properly.
- Replace the faulty crankshaft position sensor if necessary.
- Ensure ECM is receiving the correct data from the sensor.
How to Avoid It Before It Happens:
- Regularly inspect the crankshaft position sensor and wiring.
- Keep connectors clean and free from corrosion.
- Perform routine diagnostic checks on sensor performance.
- Verify ECM’s signal processing for accuracy.
- Clue’s Equipment Maintenance services track sensor health and help detect issues before they affect engine timing.
