MAF 2(mg/S)_______________________________________________ (range not available) Indicates the amount of air measured by the manifold airflow sensor in cylinder banks 1 and 2. MAF DES(mg/S) ____________________________________________ (range not available) Indicates the desired amount of airflow calculated by the ECM. MASS AIR FLOW(mg/S) _____________________________________ (range not available) Indicates the amount of air drawn into the engine under the present operating conditions. The value is in milligrams per cylinder stroke. The figure is only valid while the EGR is active.