U0427

Invalid Data Received from Vehicle Security Control Module

Moderate severity

The vehicle security controller delivers data that does not pass plausibility checks. Alarm system or remote unlocking can behave erratically.

Common causes

Security module failed
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $130-880
Gateway module routing CAN messages incorrectly
Less common, but worth ruling out after the more likely causes.
low
Typical part cost: $130-880
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does U0427 mean?

U0427 means "Invalid Data Received from Vehicle Security Control Module". It is a generic OBD-II code that points to a fault in the network / communication.

What are the most common causes of U0427?

security module failed; gateway module routing can messages incorrectly; can terminating resistor (120 ω) drifted out of spec — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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