DTC P2271: Rear Ho2S Signal Stuck Rich

Fig 1: DTC P2271 Detection Condition & Possible Causes Chart

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Diagnostic Procedure 

Fig 2: DTC P2271 Diagnostic Procedure Chart (Step 1-3)

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Fig 3: DTC P2271 Diagnostic Procedure Chart (Step 4-13)

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Fig 4: DTC P2271 Diagnostic Procedure Chart (Step 14-22)

Courtesy of MAZDA MOTORS CORP.