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 in the exhaust gas based on the A/F sensor signal. The PCM monitors the response speed of the A/F sensor to sudden changes in the oxygen concentration just after fuel cut control starts/ends. If the response speed of the A/F sensor is delayed, the PCM determines an A/F sensor malfunction and stores a DTC.