LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Genesis >> 2021 >> G90 3.3T Premium, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 3.3L (9 Of 9) >> DTC U04B1-00: Invalid Data Received From Battery Monitor Module >> Component Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Component Inspection

  1. Substitute with a known - good the battery sensor.
  2. Turn off the ignition switch.
  3. Connect the GDS and go to "Current Data".
  4. Clear DTC and Test-drive under the Enable Conditions.
  5. After the road test, check the "DTC".
  6. Is the DTC "U04B1" displayed again?

    YES 

    • Substitute with a known - good ECM and check for proper operation. If the problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

scientia non olet · About LEMON Manuals