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Home >> Alfa Romeo >> 2017 >> Giulia Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> 2.0L - DTCS P2237-00 To P2AE1-00 >> DTC Troubleshooting >> P2237-00-O2 Sensor Positive Current Control Circuit/Open >> Possible Causes
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Possible Causes

Possible Causes
O2 1/1 POSITIVE CURRENT CONTROL CIRCUIT OPEN/HIGH RESISTANCE
O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)

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