Lost Communication With EGR Temperature Sensor B

Where it lives

For U068E, the description names the sensor as the part involved.

Check these first

• EGR temperature sensor B no longer reporting on the bus
• A chafed or open wire in the sensor B circuit
• Carbon or corrosion in the sensor B connector
• A failed sensing element in EGR temperature sensor B
• A weak reference voltage or ground at sensor B

What to do next

1. Check reference voltage and ground at EGR temperature sensor B
2. Inspect the sensor B connector for carbon or corrosion
3. Test the sensor B signal wire for opens and shorts
4. Read EGR temperature live data and compare to sensor A
5. Replace EGR temperature sensor B if the fault returns
6. Clear the code and retest

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