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Home >> Suzuki >> 2007 >> Grand Vitara Base, AWD, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information And Procedures >> DTC P0401/P0402: Exhaust Gas Recirculation Flow Insufficient Detected/Excessive Detected >> System Description

System Description

EGR system consists of EGR valve and its passage. ECM judges EGR valve opening based on the following items. (engine speed, engine load, engine coolant temperature, intake air temperature and vehicle speed)

If EGR system is in good condition, intake manifold absolute pressure is varied within specified value as soon as ECM opens EGR valve.

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