What is MID 12:
MID 12 refers to an issue with the Exhaust Gas Temperature Sensor Circuit. This fault indicates that the ECM is receiving an invalid or out-of-range signal from the exhaust gas temperature sensor, which can lead to incorrect readings, potentially causing the engine’s exhaust after-treatment system to malfunction.
Why This Happens:
- Faulty exhaust gas temperature sensor.
- Shorted or damaged wiring in the sensor circuit.
- Loose or corroded sensor connectors.
- Blockages in the exhaust system affecting the sensor.
- ECM failure to process the sensor’s data properly.
How to Fix It:
- Inspect the exhaust gas temperature sensor for visible damage.
- Test the sensor’s voltage and resistance to ensure it is within specification.
- Check wiring and connectors for damage, corrosion, or loose connections.
- Replace the faulty sensor if necessary.
- Inspect the exhaust system for blockages or issues affecting sensor performance.
How to Avoid It Before It Happens:
- Regularly inspect the exhaust gas temperature sensor and wiring.
- Perform routine exhaust system maintenance.
- Keep connectors clean and corrosion-free.
- Perform diagnostic checks to monitor the sensor’s performance.
- Clue’s Equipment Maintenance services track exhaust gas systems to ensure proper temperature regulation and prevent future issues.
