Which side of the engine is bank one?

2001 LINCOLN LS

130,000 MILES • V8 • 2WD • AUTOMATIC

MANNY4201

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I Checked the engine computer and it said it is running rich,also my oxygen sensor,bank 2,section 1 is bad.My question is :does the bad oxygen sensor make the engine run rich? And which side is bank 2 and which one is section 1?
it is a Lincoln LS,2001 with 3.9 V8 engine,130000 miles.A reponse will be very much appreciated.Thank you.
Manny

Sep 17, 2009 at 10:19 PM

BLUELIGHTNIN6

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yes, a faulty O2 sensor can cause lean & rich fuel issues..the passenger side of the engine is the bank 2. section 1 will be the sensor located before the catayltic converter.

Sep 17, 2009 at 10:27 PM

MANNY4201

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Thank you very much bluelightnin6,also I'm a little confused now,auto zone tell me that bank 2 is on the driver side,what you think?
Manny

Sep 17, 2009 at 11:37 PM

BLUELIGHTNIN6

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Passengers side will be bank 1.. Whichever side of engine that cylinder 1 is located on is bank 1, other side is bank 2. Diagram below shows that your vehicle's cylinder 1 is located the passenger side.

Sep 17, 2009 at 11:42 PM

MANNY4201

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Thanks again,looking at diagram #1 cylinder is on the right(passage side)I'm confused. Manny

Sep 18, 2009 at 10:52 AM

BLUELIGHTNIN6

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So sorry about that, the arrow had me confused haha. You are correct, it is passenger side .

Sep 18, 2009 at 10:55 AM

MANNY4201

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Hello bluelightnin6,and thanks again,diagram of engine show piston #1 on passage site,so what now,I'm confused.
Manny

Sep 18, 2009 at 10:56 AM