U0427

Invalid Data Received From Vehicle Security Control Module

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–222 (est.)

Symptoms

Problems starting the engine
Alarm not working
Central locking malfunction
Check engine light is on
Error message on the dashboard

Causes

Security module malfunction
Wiring harness damage
Poor contact in connectors
ECU software error
Short circuit in the circuit

How to Fix

Check connections and connectors of the safety module
Scan all ECUs for errors
Check the integrity of the wiring to the safety module
Reflash or replace the security module
Repair only from an authorized dealer

Related codes

U0428 U0426 B0001