How to repair engine error failure code P0301 Toyota Corolla Years 00 to 15P0401 EGR Flow Insufficient This code is triggered when the EGR flow is low The EGR is designed to inject the correct amount of exhaust gas into each cylinder prior to combustion When code P0401 is triggered, it's because the DPFE sensor found too little recirculationEngineCodes Toyota P01 06 TOYOTA COROLLA
Toyota Corolla Problems And Common Complaints Toyota Parts Center Blog
