Invalid Data Received from Vehicle Immobilizer Control Module
The ECU receives an authorisation message from the immobilizer that is corrupted or out of range. Engine start is blocked.
Affected components
- Immobilizer module
Common causes
- High likelihood: Rolling code out of sync
- Low likelihood: Gateway module routing CAN messages incorrectly
- Low likelihood: CAN terminating resistor (120 Ω) drifted out of spec
Possible symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.