Function Explanation (DTC Detection Outline): 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 PCM determines a feedback correction amount malfunction and stores a DTC.
A condition in which the fuel feedback correction amount (SHRTFT12) for the HO2S is the specified value (2 %) or more and the sum (SHRTFT12+LONGFT12) 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 .

Fig 1: Fuel Feedback Correction Amount Waveform (P2096:00)
Courtesy of MAZDA MOTORS CORP.