DTC Set Conditions

These check conditions are when under the closed loop air/fuel ratio control, the engine coolant temperature is more than 171°F (77°C) and volume airflow sensor output frequency is 88 Hz or more. Judgment criteria is when long-term fuel trim has continued to be less than -12.5 percent for 5 seconds or short-term fuel trim has continued to be less than -10.0 percent for 5 seconds.

These check conditions are when under the closed loop air/fuel ratio control, the engine coolant temperature is more than 171°F (77°C) and volume airflow sensor output frequency is 88 Hz or less. Judgment criteria is when long-term fuel trim has continued to be less than -12.5 percent for 5 seconds or short-term fuel trim has continued to be less than -15.0 percent for 5 seconds.

These check conditions are when engine coolant temperature is more than 171°F (77°C) under the closed loop air/fuel ratio control. Judgment criteria is when long-term fuel trim has continued to be -12.5 percent for 5 seconds or short-term fuel trim has continued to be -25.0 percent for 5 seconds.