Bank one is the driver side.
right bank, rear cylinder
The side with cylinder #2, the pass side.
Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
The question is a little confusing.Please try to be less wordy,but more precise.Thanks
bank 2 is closer to the firewall
bank 2 is the drivers side of the engine
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
Bank 1 is the passenger side of the engine on a Ford V8 and V6
On a 2007 Dodge Nitro, the Bank 1 O2 Sensor 1 is located on the exhaust manifold, upstream of the catalytic converter. It is positioned on the driver's side of the vehicle, near the engine. This sensor monitors the oxygen levels in the exhaust gases to help manage fuel injection and emissions.
Bank 2 is the drivers side of the engine on your Ford F-250 5.4
Bank 2 is the drivers side of your 4.2 liter V6 engine in a 2005 Ford F-150