Invalid Data Received From Serial Data Gateway Module B

Where it lives

For U0448, the description names the module as the part involved.

Check these first

• Loss of power or ground at the Serial Data Gateway Module B
• An internal failure of the Serial Data Gateway Module B
• Bent or backed out pins at the Serial Data Gateway Module B connector

What to do next

1. Scan every module and record the stored codes
2. Watch Serial Data Gateway Module B data on a scan tool
3. Replace the Serial Data Gateway Module B if the wiring and voltage tests pass
4. Clear the code and retest

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