Code result
U0408
Invalid Data Received from Vehicle Immobilizer Control Module
Moderate severity
What it means
The ECU receives an authorisation message from the immobilizer that does not match the expected rolling code. Engine start is blocked.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Key not properly learned
highOne of the most commonly reported causes for this code — check this first.
Software version mismatch
mediumA plausible cause — test and verify before replacing parts.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
Related help
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