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Home › Land Rover › 2021 › Defender 90 › Repair and Diagnosis › General Information › Specifications Index › Diagnostic Trouble Code Index DTC: Headlamp Control Module (HCM) -- Defender/L663 › Diagnostic Trouble Code Index - DTC: Headlamp Control Module (HCM) (G2423982) › Description And Operation › Headlamp Control Module (HCM) › DTC U2301-88: Control Module Sub Network A - Bus off › Possible Causes

Possible Causes

NOTE: Wiring reference - SUBCAN H/SUBCAN L

SUB-CAN network communication error
SUB-CAN network circuit short circuit to ground, short circuit to power, open circuit, high resistance