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U0483 Invalid Data Received From Lighting Control Module - Front

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0483 means the front lighting control module, which switches low and high beam, daytime running and turn lamps or drives the LED channels in the headlamps, is still on the bus but delivers data the receiver rejects. U0182 would be the silent module, U0484 the rear counterpart. GM's Saab list names the front lighting control module among its partners. GM's 2024 Silverado and Sierra HD show how supply voltage upsets such a unit: with a weak battery its own voltage check fails, it resets every 8-10 s, the headlamps flash and P0606 is stored (24-NA-005), and replacing it is not the fix. Hella describes LED headlamp control units that report to the body control module over CAN and carry their own error monitoring. No manufacturer documents U0483 itself. Front lamps may revert to defaults; no MIL.

Likely causes

Weak battery or voltage dips during cranking upsetting the lighting module
Lighting module software or calibration fault
Moisture or corrosion at the module or headlamp connector

Symptoms

  • Headlamps or daytime running lamps flicker or flash
  • Exterior lighting warning in the cluster
  • Front lamps stay in a fixed default state

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–800
Time0.3–2.5 h

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

Parts involved

front lighting module

Related codes

U0182U0484U0481U0140

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