What is MID 122:
MID 122 refers to a problem with the Crankshaft Position Sensor. The ECM detects an abnormal signal from the crankshaft position sensor, which can lead to engine timing issues, stalling, misfires, and difficulty starting 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 sensor’s data correctly.
- Mechanical issues affecting sensor readings.
How to Fix It:
- Inspect the crankshaft position sensor for damage or malfunction.
- Test the sensor’s voltage and resistance to verify proper functionality.
- Check wiring and connectors for visible damage or corrosion.
- Replace the faulty sensor if necessary.
- Ensure the ECM is receiving accurate sensor data.
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 to monitor sensor performance.
- Verify the ECM’s signal processing for accuracy.
- Clue’s Equipment Maintenance services help monitor sensor health and detect issues before they affect engine timing.
