Network, generic
U047B Invalid Data Received From Restraints System Sensor K
Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo
U047B: restraints sensor K is heard but its values are rejected; U017A covers lost contact. No manufacturer documents the letter K publicly, so its position stays open. Eleven satellites point to a large system, yet not every function needs one of its own: Bosch's AB premium controller can house rollover and inertial sensing internally and accepts as many as 18 PSI5 sensors. Where curtains also deploy in a rollover, FMVSS 226 requires a readiness indicator and lets NHTSA ask the carmaker to describe the deploying sensor system. Airbag lamp on, no MIL.
Likely causes
Corroded or loose connector in the sensor line
Defective satellite sensor
Restraints controller software evaluating the sensor incorrectly
Symptoms
- Airbag warning lamp on
- Code stored in the restraints controller
Repair estimate
DifficultyHardWorkshop job
Parts and labour€50–600
Time0.5–3 h
Typical range across vehicles; the real cost depends on what the testing finds.
Parts involved
restraints system sensor k
Related codes
References: bosch-mobility.com, law.cornell.edu.