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Home >> Volvo >> 2007 >> V50 Base, 2.4 39 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 1 Of 9 >> ECM-120C: Mass Air Flow. Faulty Signal (B5254T3; 2005-2007) >> Signal Too High >> Checking The Intake System

Checking The Intake System

Check the intake system for leakage. In particular, check the hoses and hose connectors between the mass air flow (MAF) sensor and the throttle unit. Check for leakage and damage.

Check the intake system for blockages (e. g. contaminants in the throttle).

Remedy as necessary.

Other information 

Fig 1: Identifying Mass Air Flow (MAF) Sensor
GLL102920Courtesy of VOLVO CARS CORPORATION