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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L - DTCS P2AE2-00 To U148C-00 >> DTC Troubleshooting >> P302D-00-Mass Air Flow Circuit Performance Low >> Possible Causes

Possible Causes

Possible Causes
MAF SIGNAL CIRCUIT SHORTED TO GROUND
MAF SIGNAL CIRCUIT SHORTED TO THE SENSOR GROUND CIRCUIT
MASS AIR FLOW SENSOR
POWERTRAIN CONTROL MODULE (PCM)

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