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2004 Pontiac Montana 3.0L with engine codes P0030 and P0031

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2004 Pontiac Montana 3.0L with engine codes P0030 and P0031. The fault emerges when using kick-down over 50 mph. What is the location of the sensor?

Vehicle: 2004 Pontiac Montana 3.0L

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P0030 H02S heater control circuit Bank 1 Sensor 1

The location for Bank 1 Sensor 1,

Pontiac Montana Oxygen Sensor Location

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