Invalid Data Received From Serial Data Gateway Module A

Where it lives

For U0447, start at the module the description names.

Check these first

• Corrupted or outdated software in the Serial Data Gateway Module A
• Damaged bus wiring at the Serial Data Gateway Module A
• A broken or chafed Serial Data Gateway Module A wire
• Water or heat damage to the Serial Data Gateway Module A
• Bent or backed out pins at the Serial Data Gateway Module A connector

What to do next

1. Pull all module codes with a scan tool
2. Watch Serial Data Gateway Module A data on a scan tool
3. Check the Serial Data Gateway Module A circuit for opens and shorts
4. Check the power and ground feeds to the Serial Data Gateway Module A
5. Replace the Serial Data Gateway Module A if the wiring and voltage tests pass
6. Clear the code and retest

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