Code 32, EGR System Error: Notes
A properly operating EGR will directly affect the air/fuel mixture requirements of the engine. Since the exhaust gas introduced into the airflow is an inert gas (contains little or no oxygen), less fuel is required to maintain a correct air/fuel mixture. If the EGR system were to become inoperative, the inert exhaust gas would be replaced with oxygen and the air/fuel mixture would become leaner. This would be reflected in an increased block learn value.
The engine control cell of the 2.0L engine consists of 16 block learn cells. Since EGR is not used at idle, the closed throttle cell would not be affected by EGR system operation. The other block learn cells are affected by EGR operation and when the EGR system is operating properly, all block learn values in these cells should be close to the same. The difference between the closed throttle block learn cell and cell No. 10 is used by the ECM to monitor EGR system performance. When the difference between these 2 cells is greater than 12 and the block learn value in cell No. 10 is greater than 140, Code 32 is set. The system operates in block learn cell No. 10 during cruise conditions at approximately 55 MPH.