U0250Lost Communication With Impact Classification System Module
- Generic OBD-II code · Network
- How the car detects it
- Within the airbag system, an impact classification module sorts a collision by type and force, so that airbags and belt pretensioners fire in the right combination and stage. U0250 is logged when its messages no longer reach the network, most plausibly by the restraint control module. No manufacturer publishes a description, timeout or fault type for this code. Patent US7832762 on crash sensing over a vehicle bus explains why such a link is monitored at all: sensors and the occupant protection controller exchange their data as messages, so a missing node removes input from the deployment decision. Expect the airbag warning lamp to light and the restraint system to run without that information until the fault is gone. Work on it belongs in a workshop. Restraint module loss is U0151; invalid data from this unit are U0551.
- What you may notice
- Airbag warning lamp on
- Code also stored in the restraint control module
- Likely causes
- LikelyLoose or corroded connector or damaged harness to the module, often after body repair
- PossibleModule without power or ground
- PossibleModule damaged in a collision or not set up after replacement
- RareModule internally faulty
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.