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DTC › CUV2 CUV2 / 021F

Invalid combination of CAN signals from the main light switch module.

â–¶ How to fix

Check fuse for power of the main light switch. Check cable to the main light switch. Check the CAN cable between the main light switch and CUV (pin C35 and C36). If the problem remains then replace the main light switch.

What you'll see

Low beam and position lights will be active

System reaction

Amber Visibility warning

Diagnostic depth

Detection

Unknown fault on main light switch.

Possible cause

Main light switch is sending an invalide switch position to CUV.

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