bank 2 is the drivers side of the engine and sensor 2 is downstream of the catalytic converter
Bank 2 is the driver side of your engine ( V6 or V8 ) on your Ford F-150 Sensor 2 is after the catalytic converter ( downstream )
Bank 2 is the drivers side of the engine in your 2001 Ford F-150 Sensor 1 is in the exhaust before the catalytic converter ( upstream ) Sensor 2 is in the exhaust after the catalytic converter ( downstream )
The passenger side of the engine is bank 1 on your 2001 Ford F-150
Bank 1 is the passenger side of the engine in a Ford F-150 ( V6 and V8 ) Sensor 1 would be close to the engine before the exhaust enters the catalytic converter ( upstream sensor )
On a 1997 Ford E-150 : Bank 1 is the passenger side of the engine ( V6 and V8 ) Sensor 1 would be close to the engine BEFORE the exhaust enters the catalytic converter
On your Ford F-150 , V8 : Bank 1 is the passenger side of the engine Sensor 1 would be close to the engine before the exhaust enters the catalytic converter ( upstream sensor )
Bank 2 is the drivers side of your V6 or V8 engine in a 1997 Ford F-150
bank # 1 is the passenger side of the engine , sensor # 2 is after the catalytic converter ( downstream )
Bank 2 is the drivers side of the engine Sensor 2 is after the catalytic converter ( downstream )
Bank 1 is the passenger side of the engine ( 4.2 / 4.6 / 5.4 ) in your 1997 Ford F-150 Sensor 1 is in the exhaust ( close to the motor ) before the exhaust enters the catalytic converter
Bank 2 is the drivers side of the engine and sensor 2 is after the catalytic converter ( downstream ) on a Ford Explorer / F-150
Bank 1 is the passenger side of the engine in your Ford F-150 ( V6 and V8 ) Sensor 1 would be close to the engine before the exhaust enters the catalytic converter ( upstream sensor ) Sensor 2 would be after the exhaust leaves the catalytic converter ( downstream sensor )