US Patent 8234030 Vehicle and control method of vehicle

Upon satisfaction of the condition for making the malfunction diagnosis at least one of the EGR system, the air-fuel ratio sensor and the oxygen sensor during the fuel cut of the engine, a fuel cut of the engine and performing the mortaring of the engine by means of the motor MG1 are continued until the completion of the malfunction diagnoses of all objects, of which the each condition for making the malfunction diagnosis is satisfied among the EGR system, the air-fuel ratio sensor and the oxygen sensor. This arrangement ensures the occasions for making the malfunction diagnoses of the EGR system, the air-fuel ratio sensor and the oxygen sensor.