Network, generic

U0431 Invalid Data Received From Body Control Module A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0431 points at body control module A on vehicles that split body functions over several controllers; with a single BCM the code is U0422, and units B to E have U0443 to U0446. Mitsubishi documents it in the all-wheel-drive ECU, which reads body data from the ETACS unit, among them the stop light switch, and sets U0431 when that signal is abnormal; CAN lines and ETACS codes are checked before the AWD unit is replaced. Its bulletin TSB-18-23-001 (2014-18 Outlander with AWC, built before 1 March 2018) reflashes the AWC ECU when the 4WD warning comes on with U0431. Audi finds U043100 in the gateway of 2023-24 e-tron and Q8 e-tron models with an ignition that refuses to switch on, and updates comfort central module J393. U0141 is lost contact, U0331 software.

Likely causes

Software of the receiving module (e.g. AWD unit) misreads body data, reflash needed
Body control module A software or coding faulty
Supply or ground problem at body control module A

Symptoms

  • All-wheel-drive or 4WD warning lamp on
  • Ignition or comfort functions do not switch on
  • Further body-related warnings in the cluster

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€50–700
Time0.3–2 h

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

Parts involved

body control modulecan bus wiring

Related codes

U0141U0331U0422U0443

References: mitsubishitechinfo.com, mitsubishitechinfo.com, static.nhtsa.gov, static.nhtsa.gov.