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U017A Lost Communication With Restraints System Sensor K

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U017A is logged when restraint sensor K, the eleventh remote crash sensor, has stopped sending data to the restraints module. No manufacturer documents U017A publicly; the Chrysler Jeep lists in NHTSA file PE11-019 end at the sixth satellite. Why J2012 reserves so many slots becomes clear from supplier data: a current Bosch airbag control unit serves 12 PSI5 sensor interfaces, a premium version up to 18. Higher letters therefore belong to well-equipped vehicles, for example with rear-impact sensors, which Bosch also lists as a mounting option. After rear-end repairs or work in the boot floor, check first whether such a sensor was reconnected. Deployment that depends on sensor K may be switched off; the airbag lamp lights, the MIL stays off.

Likely causes

Sensor K not reconnected after rear-end or boot floor repairs
Sensor line damaged along the rear body
Crash sensor K failed
Airbag unit configuration does not match the fitted sensors

Symptoms

  • Airbag warning lamp on
  • Restraint functions depending on sensor K may be disabled
  • Scan tool shows sensor K as absent

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–600
Time0.5–3 h

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

Parts involved

restraints sensor kcrash signal wiring

Related codes

U0151U0179U017BU047B

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