Conditions for Setting the DTC

WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

The ECM detects that the predicted intake air flow into the engine is not within a predetermined range of the actual air flow into the engine.
The condition exists for more than 20 seconds.