Network, generic

U0455 Invalid Data Received From Restraints Occupant Classification System Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The occupant classification module reads sensors in the front passenger seat and reports to the restraints controller if the seat is vacant, occupied by a child seat or by an adult; FMVSS 208 lets carmakers switch the passenger airbag off automatically on that basis. U0455 means the restraints controller still receives this classification but finds it invalid, whereas U0154 is total loss of contact. Ford uses the code in the RCM: SSM 46109 and SSM 46901 concern Fusion and MKZ of model years 2017-18 showing an airbag lamp or a SYNC 911 Assist warning, list U0455 among other RCM codes and have the RCM reprogrammed and its as-built data loaded again. Chrysler's restraint fault list in NHTSA file PE11-019 keeps a separate code for an undetermined classification. Expect the airbag lamp and doubtful passenger airbag status; no MIL.

Likely causes

Restraints controller software needing an update and as-built configuration
Damaged or unplugged seat harness of the passenger seat, for example after seat removal or adjustment
Faulty occupant classification module or seat sensor mat

Symptoms

  • Airbag warning lamp on
  • Passenger airbag on/off indicator wrong or flashing
  • Emergency call function reported as unavailable

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–1,000
Time0.3–2.5 h

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

Parts involved

occupant classification module

Related codes

U0154U0452U0453U0454

References: static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.