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On my 1998 Ford E250 V6 with engine code P1131 Ford, where is bank 1?

Vehicle: 1998 Ford E250 V6

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P1131 Upstream H02S not switching Bank 1 Sensor 1

This 02 sensor is the upstream 02 sensor. Bank 1 is where cylinder 1 is located, the other side is Bank 2, being sensor 1 this makes it the upstream 02 sensor

Ford E250 Oxygen Sensor LocationHere the location of Bank 1 Sensor 1 H02S sensor

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