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Home >> Volvo >> 2000 >> S40 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Dynamic Stability Assist (DSA) & Electronic Control Module (ECM) Diagnostic Trouble Codes (644 Body) >> ECM-16: Front Heated Oxygen Sensor Signal. Signal Too Low. Permanent Fault (B4204T2 CVVT; 2000) >> Signal too low. Permanent fault >> Checking intake system >> Checking intake system
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Checking intake system

Check the intake system for air leakage according to intake system/leak test .

Was a fault detected?