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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> (Adaptive Front Lighting System Module - Electrical Diagnostics) >> DTC Troubleshooting >> B1020-29-Signal Of Front Axle Sensor Invalid (Electrical Error) - Signal Invalid >> Possible Causes

Possible Causes

Possible Causes
FRONT HEADLAMP LEVEL SENSOR OR ADAPTIVE FRONT LIGHTING SYSTEM (AFLS) MODULE CONNECTIONS
HEADLAMP LEVELING SENSOR FRONT SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
HEADLAMP LEVELING SENSOR FRONT SIGNAL CIRCUIT SHORTED TO GROUND
HEADLAMP LEVELING SENSOR FRONT SIGNAL CIRCUIT SHORTED TO VOLTAGE
FRONT HEADLAMP LEVEL SENSOR

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.  Refer to STANDARD PROCEDURE .