Network, generic

U0452 Invalid Data Received From Restraints Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The restraints control module decides on airbag and belt tensioner deployment; in many GM vehicles it also sends yaw rate, lateral and longitudinal acceleration and post-crash data to other units. U0452 means a receiver rejects these frames; U0151 is lost contact. GM's 2025 tables show the checks: the ECM tests the alive counter and protection field, 8 failures in 18 samples or 4 in 10 set a Type C code without MIL; the EOCM3 needs 6 bad messages in 10 and turns off adaptive cruise. GM bulletin 23-NA-206 names U0452 in the brake module among history codes to ignore. Ford's SSM 46901 covers 2017-18 Fusion and MKZ with an airbag lamp or SYNC 911 Assist message and U0452 in the APIM; the RCM gets new software. SSM 46902 blames CAN overload in the F-150 FCIM.

Likely causes

Restraints control module software needs reprogramming
Receiver stores the code as history after start-up or network wake-up without a real fault
High CAN bus load, poor ground or connector fault on the restraints network branch

Symptoms

  • Airbag warning lamp on
  • Emergency call or crash notification message
  • Adaptive cruise or stability functions unavailable

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–900
Time0.3–2.5 h

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

Parts involved

restraints control modulecan bus wiring

Related codes

U0151U0453U0455U0432

References: gsi.ext.gm.com, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.