Toyota Avalon P0401 EGR issue resolved by engaging ECT PWR button on Toyota Avalon

Some Toyota Avalon owners report experiencing issues related to the P0401 EGR code, indicating insufficient EGR flow. Engaging the ECT PWR button does not resolve this problem, as it primarily affects transmission shift points rather than the EGR system. To effectively address the P0401 code, owners are advised to diagnose the EGR valve operation and position using a scan tool. Cleaning the EGR passages and the EGR temperature sensor may also help rectify improper EGR flow. Following proper diagnostic procedures and repair steps is crucial for ensuring the smooth operation of the Avalon.