Network, generic

U0472 Invalid Data Received From Restraints System Sensor B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0472 points to restraints sensor B: the airbag controller hears it but discards the transmitted values as corrupt or implausible, whereas U0171 would mean silence. Chrysler's NHTSA filing PE11-019 lists sensor B as the right-hand up-front satellite measuring acceleration on its 2007-2008 Jeep models, paired with internal fault B1B71. Front satellites of this kind sit in the crumple zone, where they notice a frontal crash earlier than the central unit. How much depends on their mounting is shown by Land Rover recall N685 for the 2022 Range Rover: front crash sensors fastened below the specified torque could work loose, feed the restraints system wrong information and even cause an unwanted frontal airbag deployment. Expect the airbag warning lamp; no MIL.

Likely causes

Front sensor not tightened to specification or loosened after body repair
Chafed or corroded harness between front sensor and airbag controller
Measuring element of the right front satellite defective

Symptoms

  • Airbag warning lamp on
  • Frontal crash detection possibly degraded until repair

Repair estimate

DifficultyHardWorkshop job
Parts and labour€60–450
Time0.5–1.5 h

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

Parts involved

restraints system sensor b

Related codes

U0171U0471U0473U0452

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