DTC P2253, P2256: Notes

DTC P2253  : Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) AFV Circuit High Voltage DTC P2256  : Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) AFV Circuit High Voltage

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Before you troubleshoot, review the How to Troubleshoot .