U0480Invalid Data Received From Seat Belt Pretensioner Module B
- Generic OBD-II code · Network
- How the car detects it
- U0480 mirrors U047F for seat belt pretensioner module B: the receiver gets its messages but finds them invalid, whereas U017F would mean silence. Honda's patent US 7,686,118 shows how such a unit is tied in: a dedicated electric belt controller drives the retractor motor, sits on the vehicle LAN, takes collision warnings from the brake control unit and receives the buckle signal routed through the airbag controller. With that many partners, bad data can come from the module itself or from inputs it relays. Autoliv's patent US 7,140,571 describes motor-driven reversible pre-crash tensioning. On 2025-2026 Audi models bulletin 2081251 records U017F00 beside U017E00. Comfort and pre-crash belt functions may switch off; no MIL.
- What you may notice
- Belt pre-tensioning or haptic belt warning unavailable
- Restraint system warning message
- Likely causes
- LikelySoftware fault in pretensioner module B or the unit sending it data
- PossibleFaulty input relayed through the module, such as the buckle signal
- RareInternal fault in the motorised retractor
- Repair
- Hard · Usually a job for a workshop.Typical cost: €0 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.