Network, generic

U0482 Invalid Data Received From Headlamp Leveling Control Module A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0482 is stored when messages from headlamp leveling control module A arrive but fail the receiver's integrity or plausibility checks; complete loss of contact is U0181, and U048B covers a second leveling unit. Such a module takes axle ride-height signals and moves the beam actuators so that a loaded boot or hard braking does not lift the cut-off line, as Hella explains; dynamic versions also react to acceleration. The module may publish values for others: Subaru bulletin 07-232-26 for the 2024 WRX with manual gearbox describes leveler modules whose computed vehicle inclination always read 0 degrees on the centre display, cured by a unit with revised logic. GM's Saab list names the partner U0181 without a letter. No manufacturer documents U0482 itself. Beam height may freeze; lighting warning, no MIL.

Likely causes

Bent or faulty axle ride-height sensor feeding implausible values into the module
Leveling module software computing or transmitting wrong values
Basic setting of the leveling system not performed after repair or replacement

Symptoms

  • Headlamp leveling warning in the cluster
  • Beam height no longer adapts to load and may dazzle or fall short
  • Inclination display or related functions show fixed values

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–700
Time0.5–2.5 h

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

Parts involved

headlamp leveling module a

Related codes

U0181U048BU018AU0483

References: static.nhtsa.gov, hella.com, saabwisonline.com.