Yes.
Replace it.Replace it.
Bank # 1 is the passenger side of the engine in a Ford Expedition Sensor # 1 would be before the catalytic converter ( upstream sensor ) Sensor # 2 would be after the catalytic converter ( downstream sensor )
Bank 1 is the passenger side of the engine in your Ford Expedition Sensor 2 is after the catalytic converter ( downstream )
97 expedition having same prob heard catalytic converter ? hope not 97 expedition having same prob heard catalytic converter ? hope not
$1800
Bank 2 is the drivers side of the engine Sensor 1 is before the exhaust enters the catalytic converter ( upstream )
On a Ford Expedition : Bank 1 is the passenger side of the engine Sensor 1 would be close to the engine BEFORE the exhaust enters the catalytic converter Sensor 2 would be in the exhaust AFTER it exits the catalytic converter
Loss of power, poor fuel economy, and converter gets extremely hot.
Bank 2 is the drivers side of the engine in a Ford Expedition Sensor 2 is after the catalytic converter ( downstream )
remove it then install new one
A bad coil can damage a converter. If the engine is misfiring, it will cause raw fuel to get into the converter and that can cause failure.