Hesitation, Sag, Stumble

WARNING: This page is about a different car, the 2008 Suzuki Swift +, 2008 Pontiac Wave, and 2008 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

Test the manifold absolute pressure (MAP) sensor. Refer to DTC P0106 (w/TAC) or DTC P0106 (wo/TAC) .
Test the generator. Refer to Symptoms - Engine Electrical . Repair the charging system if the generator output voltage is less than 9 volts or more than 16 volts.