Generator Control Module

Where it lives

For P0A1A, the part to look at first is the module named here.

Check these first

• A generator control module that has failed
• Corrosion in the module wiring
• A software fault in the module
• A failing alternator
• Low battery voltage

What to do next

1. Read generator control module data on a scan tool
2. Check the battery voltage and charging system
3. Inspect the module wiring and connectors
4. Check for a module software update
5. Replace the module if it does not communicate
6. Clear the code and retest

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