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U0474 Invalid Data Received From Restraints System Sensor D

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0474 flags unusable data from restraints sensor D. Chrysler's lists in NHTSA file PE11-019 assign D to the second left-side satellite acceleration sensor (internal fault B1B73, lost contact U0173). It appears only for the 2007-2008 Compass and Patriot, which carry six satellites, and is absent from the four-sensor Wrangler list. A later FCA layout with two side sensors per flank is the 2019 Cherokee: recall 19V-449 replaced two front sensors in the engine bay and four side sensors in B- and C-pillars, because faulty solder joints could cut them off from the occupant restraint controller and make airbags fire late or not at all. That recall names no letters, so the pillar behind D stays unconfirmed. Airbag lamp on; no MIL.

Likely causes

Cracked solder joint inside the satellite sensor
Connector or wiring fault at the rear side sensor behind the pillar trim
Restraints controller configured for a different sensor layout

Symptoms

  • Airbag warning lamp on
  • Side impact sensing on the left reduced

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–500
Time0.8–2.5 h

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

Parts involved

restraints system sensor d

Related codes

U0173U0473U0477U0452

References: static.nhtsa.gov, static.nhtsa.gov.