Mazda RX-8 Workshop Manual page 464

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2011 - RX-8 - Engine
DTC P2196 [13B-MSP]
DTC P2196 A/F sensor signal stuck rich
DETECTION
CONDITION
The PCM monitors the A/F sensor output current when the following
conditions are met. If the average output current is less than 0.85 A for
25 s, the PCM determines that the A/F sensor signal remains rich.
MONITORING CONDITIONS
ECT: more than 70 °C {158 °F}
Engine speed: 1,000—3,200 rpm
MAF amount: 6—80 g/s {0.80—10.58 lb/min}
Target A/F feedback system status: feedback control
Input voltage from the HO2S: less than 0.2 V
Diagnostic support note
This is an intermittent monitor (A/F sensor, HO2S).
The MIL illuminates if the PCM detects the above malfunction condition in
two consecutive drive cycles or in one drive cycle while the DTC for the same
malfunction has been stored in the PCM.
PENDING CODE is available if the PCM detects the above malfunction
condition during the first drive cycle.
FREEZE FRAME DATA (Mode 2/Mode 12) is available.
The DTC is stored in the PCM memory.
Erratic signal to PCM
APP sensor signal malfunction
ECT sensor signal malfunction
MAF sensor signal malfunction