U047AInvalid Data Received From Restraints System Sensor J
- Generic OBD-II code · Network
- How the car detects it
- U047A means the airbag controller receives restraints sensor J but its content fails validation; lost contact is U0179. Which component carries the letter J is not published anywhere. Pedestrian protection is one source of extra inputs: Bosch fits either acceleration sensors or an air-filled tube with a pressure sensor at each end into the front bumper, lets the airbag controller evaluate them and can raise the hood within 10 to 15 ms. Corrupt data from such a sensor would put that function in doubt as well. Airbag lamp on, no MIL.
- What you may notice
- Airbag or pedestrian protection warning shown
- Code stored in the restraints controller
- Likely causes
- PossibleBumper-mounted sensor damaged by a parking knock or bumper repair
- PossibleLine or connector fault on the sensor circuit
- RareController coding does not match the fitted sensors
- 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.