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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 2.0L - DTCS P0480-00 To P0687-00 >> DTC Troubleshooting >> P0651-00-Sensor Reference Voltage "B" Circuit/Open >> Possible Causes

Possible Causes

Possible Causes
MAF SENSOR
ENGINE OIL PRESSURE SENSOR 2
ENGINE OIL TEMPERATURE SENSOR 2
WASTEGATE POSITION SENSOR (WASTEGATE SOLENOID)
APP SENSOR
5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
POWERTRAIN CONTROL MODULE 1

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