High/Medium/Low represents the probability of this cause occurring
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Suggest to check reverse lamp wiring is aged or broken, restore or replace the wiring depends on the aged condition. Suggest to repair at workshop. Usual keypoints of diagnose are:
1. Check if the bulb in fog lamp is fused.
2. Check if the wiring is aged, replace the wiring harness if it is severely aged.
3. Use the scan tool to clear fault code after repairing done.