Bank One contains the No 1 cyl. Ford Taurus/Sable it is the rear bank cylinder on the passenger side with one, three and six cylinders. Front is Bank Two, cylinders 2,4, and 6.
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On a 2000 Mercury Sable , 3.0 L V6 ( Vulcan + Duratec )
firewall
1-----2-----3 ( Bank 1 )
4-----5-----6 ( Bank 2 )
front of vehicle > driver
On a Mercury Sable V6 engine : firewall 1-----2-----3 ( Bank 1 ) 4-----5-----6 ( Bank 2 ) front of vehicle > driver
Bank 2 is the drivers side of the engine in a 2000 Mercury Grand Marquis
On a 2000 Mercury Mountaineer ( 4.0 V6 and 5.0 V8 ) Bank 2 is the drivers side of the engine Sensor 1 is close to the engine BEFORE the exhaust enters the catalytic converter Sensor 2 is AFTER the exhaust has passed through the catalytic converter
An engine "Bank 1" side is the side with cylinder #1 on it.From that point of reference, that would make the side of the engine closest to the windshield/firewall Bank 1.Doing the math then makes the side/bank of the engine closer to the front of the vehicle bank 2.-Firewall-1-2-3 (bank 1)4-5-6 (bank 2)-Frt of car-See "Related Questions" below for more
Bank 1 is the passenger side of the engine and bank 2 is the drivers side of the engine on your 1997 Mercury Mountaineer 5.0 liter V8 engine
Bank 1 is the passenger side of the engine in your Mercury Mountaineer ( V6 and V8 ) and bank 2 is the drivers side of the engine
Bank one is on the side that the master cylinder is on bank two is the opposite side of the master cylinder
The oxygen sensor for bank 1 sensor 1 for a 2000 mercury mountaineer is on the cylinder #1 side.
Trouble code P0172 means: System Too Rich (Bank 1)
I'm going by the bank 2 sensor on my '98 Sable (which I recently replaced), but I did a quick search online, and it appears the 2000 is in the same place. It is mounted on the top of the exhaust pipe a few inches behind the catalytic converter. It's not too hard to replace if you have the O2 sensor socket. Getting at the connector at the other end of the pigtail is no treat, but it can be done with some patience and limber fingers.
Trouble code P0135 means:O2 sensor heater circuit malfunction (Bank 1 Sensor 1)
Passenger ===================================================== Actually , bank 2 is the drivers side of the engine in a Mercury Mountaineer