Body, generic

B0093 Left Side Restraints Sensor 3

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0093 is the third left-side crash sensor. Mitsubishi mounts it at the left C-pillar, names it C-PILLAR SAT SEN LH and gives the J2012 wording Left Side Restraints Sensor 3. Unlike the B-pillar unit, it carries the full set of subtypes: -11 when the sensor line is shorted to ground, -55 for a configuration mismatch, -81 when communication with the sensor fails, and others, each confirmed after two seconds with the ignition on. A sensor that far back can give the module an early view of impacts behind the front door. Bosch lists C-pillars among the mounting points for its acceleration satellites, and Continental's gSAT measures acceleration in rigid structure for the same purpose. The airbag lamp lights while B0093 is stored.

Likely causes

Sensor line shorted to ground or poor contact at the C-pillar plug (subtypes -11/-81)
Internal fault of the C-pillar satellite sensor
Airbag unit configuration not matching the vehicle (subtype -55)
Internal fault of the airbag diagnosis unit

Symptoms

  • Airbag warning lamp on
  • Left side impact sensing behind the front door is degraded
  • Safety note: airbag system; disconnect the battery and keep the wait time before work at the rear pillar, specialist workshop only

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–500
Time0.5–2.5 h

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

Parts involved

left side impact sensor 3srs wiringsrs control module

Related codes

B0091B0092B0098B009A

References: mitsubishitechinfo.com, mitsubishitechinfo.com, mitsubishitechinfo.com, bosch-mobility.com.