Body, generic

B0028 Right Side Airbag Deployment Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0028 is the right-hand twin of B0020: the firing loop of the right front side airbag, normally in the outer flank of the passenger seat. Honda asked for parts from 2018-20 Accord and CR-V and from the 2015 TLX that stored B0028-13, an open or raised resistance in the passenger side airbag inflator. FCA traces B0028-13 on the Cherokee and Chrysler 200 to the jumper harness in the seat, and Toyota's 2022 Tundra stored B002811 or B002812 because the wireless phone charger disturbed the module. Mitsubishi confirms a short to ground after 2 seconds. The older GM numbering differs: the 2006 Saab 9-5 and the 9-3 used B0028 for low resistance in the passenger side bag loop, under 1.5 ohms. Airbag lamp on.

Likely causes

Poor contact or corrosion at the side airbag connector or jumper harness under or in the seat
Internal fault in the right seat side airbag inflator
Lead pinched or stretched by seat adjustment
Restraint module software reacting to interference (Toyota Tundra 2022)

Symptoms

  • Airbag warning lamp on
  • Right front side airbag may not deploy in a side impact
  • Safety note: do not probe the airbag circuit yourself; unplug airbag connectors only with the battery disconnected and the stated wait time observed

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–900
Time0.5–3 h

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

Parts involved

right side airbag modulesrs control modulesrs seat wiringseat harness connector

Related codes

B0020B0029B0038

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, mitsubishitechinfo.com.