U0478Invalid Data Received From Restraints System Sensor H
- Generic OBD-II code · Network
- How the car detects it
- U0478 flags invalid data from restraints sensor H, the counterpart of lost-contact code U0177. No manufacturer publishes which sensor carries the letter H; the Chrysler fault tables filed with NHTSA under PE11-019 stop at G. An H implies at least eight satellites. Bosch's arithmetic allows that: besides acceleration satellites it wires two or four pressure sensors inside the door cavities, so four door sensors plus two side and two front acceleration sensors already add up to eight. Bosch's small AB light unit, with six sensor inputs at most, could not serve such a layout. Airbag lamp on, no MIL.
- What you may notice
- Airbag warning lamp on
- Code present only in the restraints controller
- Likely causes
- PossibleMoisture or a damaged seal affecting a door-mounted pressure sensor
- PossibleSensor line damaged, for example in a door hinge harness
- RareRestraints controller coded for a sensor set that is not fitted
- Repair
- Hard · Usually a job for a workshop.Typical cost: €50 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.