Home >> Infiniti >> 2015 >> Q50 Base, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Driver Assistance System (ADAS Control Unit- Diagnostic Trouble Codes (DTCS) And Component R&R) (Exc Hybrid) >> DTC/Circuit Diagnosis >> DTC U1521: Sonar Can 2 >> DTC Logic >> Possible Cause