Monitor Description
Function Explanation (DTC Detection Outline)
- The ECM detects the oxygen concentration passing through the catalyst by the HO2S signal and performs fuel injection amount correction to maintain optimum purification conditions in the catalyst. To maintain optimum purification conditions in the catalyst, the fuel injection correction has a "Feedback correction amount" which performs correction according to the driving conditions relative to the previously set air/fuel ratio, and a "Learning correction amount" which corrects for deterioration over time.
- "Fuel feedback correction amount (Short Term Fuel Trim (Bank 1, Sensor 2))" and "Fuel learning correction amount (Long Term Fuel Trim (Bank 1, Sensor 2))" can be verified from the Techstream PID item.
P2096-00
- If a condition in which the feedback correction amount from the HO2S signal is large (fuel injection amount being increased) continues for the specified time (25 s), the ECM determines a feedback correction amount malfunction and stores a DTC.
- A condition in which the fuel feedback correction amount (Short Term Fuel Trim (Bank 1, Sensor 2)) for the HO2S is the specified value (2 %) or more and the sum (Short Term Fuel Trim (Bank 1, Sensor 2)+Long Term Fuel Trim (Bank 1, Sensor 2)) of the fuel feedback correction amount and the fuel learning correction amount is the specified value (2.3 - 2.5 %) or more continues for a period of 25 s.
P2097-00
- If a condition in which the feedback correction amount from the HO2S signal is small (fuel injection amount being decreased) continues for the specified time (25 s), the ECM determines a feedback correction amount malfunction and stores a DTC.
- A condition in which the fuel feedback correction amount (Short Term Fuel Trim (Bank 1, Sensor 2)) for the HO2S is the specified value (-2 %) or less and the sum (Short Term Fuel Trim (Bank 1, Sensor 2)+Long Term Fuel Trim (Bank 1, Sensor 2)) of the fuel feedback correction amount and the fuel learning correction amount is the specified value (-2.5 - -2.3 %) or less continues for a period of 25 s.