Lost Communication With Reductant Control Module

Where it lives

For U010E, start at the module the description names.

Check these first

• Wiring or connector faults between the ECM and the reductant control module
• A failed reductant control module
• An ECM fault on the communication bus
• Physical damage to the reductant module

What to do next

1. Inspect the reductant control module connectors and harness
2. Check the module power and ground
3. Check the ECM to reductant module bus
4. Verify the module responds on a scan tool
5. Replace the reductant control module if it stays offline
6. Clear the code and retest

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