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U0179 Lost Communication With Restraints System Sensor J

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0179 closes the J2012 block for remote restraint sensors and names sensor J, the tenth position (the letter I is used as well, see U0178). The airbag control unit checks that each connected satellite keeps sending; if sensor J falls silent, the unit stores U0179, switches on the airbag warning lamp and may disable the deployment paths that rely on it. No manufacturer documents U0179 publicly, and Chrysler's published Jeep list stops at the sixth satellite (U0176), so this code is rare. Bosch describes peripheral sensors in front, side and rear positions, which explains why up to ten slots exist. U0170 to U0178 cover sensors A to I, U0151 the airbag unit itself. No MIL; repairs only by trained staff.

Likely causes

Connector at sensor J loose or corroded
Open or shorted line between sensor J and the airbag unit
Crash sensor J failed, e.g. after a minor impact
Airbag control unit input faulty

Symptoms

  • Airbag warning lamp on
  • Restraint deployment relying on sensor J may be disabled
  • Scan tool shows sensor J as not responding

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–600
Time0.5–2.5 h

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

Parts involved

restraints sensor jcrash signal wiring

Related codes

U0151U0170U0177U0178

References: bosch-mobility.com, bosch-mobility.com, static.nhtsa.gov.