Body, generic

B009D Right Side Restraints Sensor 4

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B009D opens the second half of the right-side sensor row, after B0096 to B0098. No carmaker documents this code publicly; Mitsubishi stops its right row at the C-pillar sensor B0098, and Honda's Fit and HR-V use only two side sensors per side. What a failing side satellite means in practice is shown by FCA recall 19V-449: on 2019 Jeep Cherokees the restraint controller could lose contact with acceleration sensors, which lit the airbag lamp and risked late or no deployment, so the sensors were replaced. Bosch's PSI5-linked SMA773 is an example of such a satellite, measuring two axes up to 60 g. A stored B009D therefore means the module has lost or rejected a fourth right sensor; its location comes from the maker's documentation. The airbag warning lamp stays lit.

Likely causes

Communication with the fourth right sensor lost through wiring, plug or sensor fault
Internal fault of the fourth right crash satellite
Airbag module coded for a sensor layout the vehicle does not have

Symptoms

  • Airbag warning lamp on
  • Right side impact detection in the area of that sensor is weaker
  • Safety note: airbag system; disconnect the battery and keep the wait time before work on sensors, specialist workshop only

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–500
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

right side restraints sensor 4srs wiringsrs control module

Related codes

B009EB009FB0098B009A

References: static.nhtsa.gov, bosch-semiconductors.com, mitsubishitechinfo.com, static.nhtsa.gov.