Network, generic

U0427 Invalid Data Received From Vehicle Security Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The vehicle security control module looks after theft protection: alarm, door, bonnet and tailgate monitoring and, with some makers, the key authorisation for the engine. U0427 marks messages from this module that reach a partner but fail its checks. No manufacturer documents U0427 publicly; GM's 2013 bulletin PIP5094 only names it among many codes for which terminal fit comes before circuit tests. Chrysler shows how far the module may reach: bulletin 18-023-13 for the 2012-2013 Grand Voyager 2.8 L diesel names its wireless control module the vehicle security control module in U0168 and treats that code as a sign of a disturbed ignition handshake, cured by PCM software. If it joins the key check, the start may be refused; otherwise alarm or remote locking misbehave. U0168 is lost contact, U0327 software. No MIL is expected.

Likely causes

Security control module faulty or reset during start-up
Aftermarket alarm or remote start interfering with the module or its supply
Poor terminal fit or corrosion at the module connector

Symptoms

  • Alarm triggers falsely or cannot be armed
  • Remote locking or keyless functions unreliable
  • Engine start refused on vehicles where the module joins the key check

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–700
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

vehicle security module

Related codes

U0168U0327U0426

References: static.nhtsa.gov, static.nhtsa.gov, en.wikipedia.org.