Immobilizer to PCM Signal Error

Check these first

• A communication fault between the immobilizer and the powertrain control module
• An open or short in the immobilizer to PCM signal circuit
• A key that the immobilizer does not recognize
• A failed immobilizer module or powertrain control module

What to do next

1. Read immobilizer and powertrain control module codes on a scan tool
2. Check the key against the immobilizer with a scan tool
3. Inspect the immobilizer to PCM signal wiring and connections
4. Test the signal circuit for open and short faults
5. Reprogram or replace the immobilizer or powertrain control module if the fault remains
6. Clear the code and retest

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