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U031E Software Incompatibility With Parking Assist Control Module B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Parking assist control module B is a second park aid unit, found where front and rear sensors are split between controllers or an automatic parking controller sits beside the distance warning; which unit gets the letter B is decided by each maker. U031E is set when a partner module rejects the software or setup of module B, mostly after a replacement or an incomplete update. No manufacturer documents U031E publicly. FCA illustrates how such units react to bad calibration data: on 2015–2016 Jeep Renegade with ParkSense or parallel and perpendicular park assist, the park assist module stored B1000-46, the cluster announced that ParkSense was not available, and only a reflash at stable voltage helped (08-078-16). U0243 is lost contact, U0544 invalid data, U031D covers module A. Distance warnings or self-parking stay off.

Likely causes

Second parking module replaced or taken from another car without programming
Module variant does not match the fitted sensor set or parking option
Software update of the parking module interrupted or incomplete

Symptoms

  • Park assist unavailable message in the cluster
  • No warning tones from front or rear sensors
  • Automatic parking function cannot be started

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–600
Time0.3–1.5 h

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

Parts involved

parking assist module bcontrol module software

Related codes

U0243U0544U031DU0300

References: static.nhtsa.gov, en.wikipedia.org, en.wikipedia.org.