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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 2.0L - DTCS B1810-00 To P0111-00 >> DTC Troubleshooting >> P0039-Turbocharger/Supercharger Bypass Valve "A" Control Circuit Range/Performance >> Possible Causes

Possible Causes

Possible Causes
TURBOCHARGER SURGE VALVE HOSE PINCHED/RESTRICTED
TURBOCHARGER SURGE VALVE STICKING CLOSED
POWERTRAIN CONTROL MODULE (PCM)

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

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