Network, generic

U017D Lost Communication With Restraints System Sensor N

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U017D concerns restraint sensor N, the last of the fourteen sensor letters A to N; the two codes that follow belong to seat belt pretensioner modules. No manufacturer documents U017D publicly, and the Chrysler Jeep tables in NHTSA file PE11-019 never go past G. Bosch scales its premium airbag units to as many as 18 sensor inputs, so a fourteenth satellite is possible but rare. Most such sensors talk PSI5, an open interface developed from Autoliv, Bosch and Continental designs that sends Manchester-coded current pulses at 125 kbit/s over a twisted pair. That pair carries supply and data together, so a wiring repair must keep the twist and use approved crimp connectors. U047E is the invalid-data counterpart. Airbag lamp on, no MIL.

Likely causes

Connector at sensor N loose or corroded
Earlier wiring repair untwisted or with unsuitable connectors
Crash sensor N failed
Airbag unit expects a sensor N that is not installed

Symptoms

  • Airbag warning lamp on
  • Scan tool reports no response from sensor N
  • Restraint deployment relying on sensor N may be disabled

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 ncrash signal wiring

Related codes

U0151U017AU017CU047E

References: en.wikipedia.org, bosch-mobility.com, static.nhtsa.gov.