Invalid Data Received From Vehicle Immobilizer Control Module

Where it lives

For U0426, the description names the module as the part involved.

Check these first

• Corroded or damaged pins at the Vehicle Immobilizer Control Module connector
• A key or fob the Vehicle Immobilizer Control Module does not recognize
• A broken or chafed Vehicle Immobilizer Control Module wire
• A faulty transceiver in the Vehicle Immobilizer Control Module
• A weak power or ground feed to the Vehicle Immobilizer Control Module

What to do next

1. Scan every module and record the stored codes
2. Inspect the Vehicle Immobilizer Control Module connector for corrosion or backed out pins
3. Check the Vehicle Immobilizer Control Module circuit for opens and shorts
4. Verify power and ground at the Vehicle Immobilizer Control Module
5. Replace the Vehicle Immobilizer Control Module if the circuit and grounds test good
6. Clear the code and retest

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