Chrysler Repair: Fault codes P0154 and P0174, 3.3L 97, 1997 dodge intrepid, p0174

Question
I have a 1997 Dodge Intrepid with a 3.3 engine. I have two codes that came up. The one code is P0174 which says left front fuel system lean. Do you have any idea what that means and if there is a part bad and where it is located? The other code is P0154 which says O2 sensor CKT no activity bank 2 sensor 1. Doyou know where this sensor is located. P0154 only came up one time after I  cleared it out but code P0174 keeps coming up after I clear it out. Would code P0154 make the other code P0174 keep coming up if the O2 sensor is going bad. Any suggestions would be appreciated. The car still runs pretty good.

Answer
Hi Bob,
I saw that you asked the question of Kevin and that he had discouraged you from pursing a solution yourself. So I did an  
"add to that answer" this morning and it may show up in you in box tomorrow.
In any case, basically I suggested that the oxygen sensor on the exhaust manifold on the left side of the engine (left is the driver side; I mistakenly thought of a transverse engine in my 'add' so ignore that error) be inspected to see if the delicate wires that thread into the very tip of the insulator were damaged. If so then that would suggest replacing it. Even so if those look OK I would still replace that sensor unless when you check the harness into which it plugs you find some melted insultation or sign of damage to the wiring along the way back to the computer (or at least as far as you can follow it). The sensor is on the inner side of the left exhaust manifold, that is closer to the engine block (at least that is how it appers in a sketch that I have). It looks sort of like a spark plug and would be the only such device attached to the exhaust manifold in any case.  
If you want to remove it for replacement you would put some penetrating oil on it an let it soak overnight. Then using a box-end wrench remove it, rock it back and forth to free-up the threads. The new one comes with grease to put on the threads so it doesn't rust in place. Don't get any grease on the "business" end of the sensor. Tighten it about the same as you do a spark plug. I think these two codes are consistent because both speak of a problem of mixture being lean on that left cylinder bank.
No guarantees, but you could try it yourself and save the labor cost and probably get the part cheaper too.
Roland

Roland: Does transverse means sitting sideways. So if my engine is sitting facing forward and you are looking at it from the front would Bank 2 sensor 1 be on the passenger side which would be the left side. I get confused with Bank 2 sensor 1 and Bank 1 sensor 1. Which side is what. But you are a big help. Thanks.


Hi Bob,
Right and Left are with respect to the engine as an entity, not the car in which it sits. The front of the engine is of course that which has the drive belts, etc. So left is considered to be the side to left of the engine, as if it were a 'being'. In this case left would be the side on the driver's side (this also being of course a 'left-hand drive' vehicle, as viewed from the rear of the car). The passenger side in your car has the right side of the engine. So find the sensor and see what you find.
Thanks for the kind remarks and the nomination.
Roland