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Home >> Lexus >> 2021 >> GX 460 Luxury >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting System (Exterior) (Diagnostic Codes & Circuit Tests) >> Lighting System >> DTC U0242: Lost Communication With Headlamp Control Module "B" [08/2019 - 08/2021] >> Description

DTC U0242: Lost Communication With Headlamp Control Module "B" [08/2019 - 08/2021]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U0242 Lost Communication With Headlamp Control Module "B" The No. 1 headlight ECU sub-assembly LH does not receive data from the No. 1 headlight ECU sub-assembly RH for approximately 10 seconds or more.
  • Harness or connector
  • No. 1 headlight ECU sub-assembly LH
  • No. 1 headlight ECU sub-assembly RH
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