Function Explanation (DTC Detection Outline)
WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
- The PCM 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 (SHRT_FUEL_TRIM_HO2S_SEN)" and "Fuel learning correction amount (LONG_FUEL_TRIM_HO2S_SEN)" can be verified from the M-MDS PID item.