U0455 code meaning
Invalid Data Received From Restraints Occupant Classification System Module
What U0455 means
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.
U0455 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.3 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0455
- Airbag warning lamp on
- Passenger airbag on/off indicator wrong or flashing
- Emergency call function reported as unavailable
Common causes of U0455
- Most likelyRestraints controller software needing an update and as-built configuration
- PossibleDamaged or unplugged seat harness of the passenger seat, for example after seat removal or adjustment
- Less likelyFaulty occupant classification module or seat sensor mat
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Occupant classification module
What each part of U0455 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 55 | The exact fault in that area. |
What to do next
- Note U0455 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0455
What does U0455 mean?
U0455 means "Invalid Data Received From Restraints Occupant Classification System Module". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with U0455?
U0455 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0455 fail an emissions test?
U0455 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0455 to fix?
Difficulty: workshop only. A typical repair takes 0.3 to 2.5 hours of work. This is a job for a workshop.
Will U0455 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.