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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L - DTCS P2237-00 To P2AE1-00 >> DTC Troubleshooting >> P2ABF-00-Intake Air O2 Sensor Reference Voltage Circuit/Open Bank 1 >> Possible Causes

Possible Causes

Possible Causes
INTAKE O2 SENSOR RETURN CIRCUIT OPEN/HIGH RESISTANCE
INTAKE O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)

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

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