EGR Temperature Sensor C Circuit High

Where it lives

For P04D1, the sensor sits on the circuit this code reports. The description of P04D1 reports a fault at the sensor.

Check these first

• EGR temperature sensor C signal pulled high
• A short to voltage in the sensor C signal wire
• An open signal return at sensor C driving the reading high
• Corrosion or water in the sensor C connector
• A failed thermistor in EGR temperature sensor C

What to do next

1. Inspect the EGR temperature sensor C connector for corrosion
2. Test the sensor C signal wire for a short to voltage
3. Check the sensor C signal return for an open
4. Read EGR temperature live data on sensor C
5. Replace EGR temperature sensor C if the signal stays high
6. Clear the code and retest

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