Bank 1 Sensor 1 - Oxygen sensor needs to be replaced. 2001 Chrysler Town and Country 3.3 Is this a job I can do myself? Where can I get an engin schematic?

all v engines have 2 or 4
i can be different for calif. cars.. are yah?
1996 is USA (calif , federal versions)
1998 is canada
3.8L: V6
the version that has a crossover ,bank 1 to bank 2.
so shares a cat ,and has 1 sensors in front of cat on manifold
and 1 for the cat. rear.
the rear 02 is seen a wire to a grommet under drivers seat
to the cat rear. 02 sensor
the front sensor, is under wiper motor, the book says it must be removed, wiper motor. first


just for you, a photo of rear exh man.
marked up

o2 marked
Cr for cross over to front bank (a pipe)
T for tail , it goes to the CAT.





2 sensors here, !

http://ricksfreeautorepairadvice.com/oxygen-sensor-location/

Sensor is behind engine and between engine and firewall, the spring on electrical cable should identify it. One recommend you go to you tube for removal and installation.

Did you replace the bank one sensor.

go to youtube
O2 Oxygen Sensor Replace on 2001 Town and Country
O2 Oxygen Sensor Replace on 2001 Town and Country

code p0040 refers to oxygen sensor signals swapped , bank 1 sensor 1 / bank 2 oxygen sensor 1===causes --wiring problems . Check that the wiring connections on the ECM or swapped on the sensors or wrong sensors in the system. One will be HO2S and the other is a O2S

DTC P0171 - System Too Lean (Bank 1)
Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC (Diagnostic Trouble Code) is very similar to P0174, and in fact your vehicle may show both codes at the same time.

I would suggest that you take a look at the front oxygen sensor. Typically speaking the oxygen sensor causes this code to appear. Here is the possible cause list from the manual for your car.

Trouble Code: P0171 (2.5L V6 Auto) - Fuel System Lean (Bank 1)

Possible Causes:
Air leaks in intake manifold, exhaust pipes or exhaust manifold
Base engine mechanical problem causing a lean A/F condition
Fuel control Sensor is out of calibration (e.g., ECT, IAT or MAP)
Fuel delivery component fault (clogged filter, low fuel pressure)
O2 element is contaminated, deteriorated or it has failed
Vacuum hose is disconnected, broken, leaking or loose

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I do not have a diagram but, bank 1 is the bank where #1 cylinder is at. other side would be bank #2. so bank #1 o2 sensor is just before convertor.

the oxygen sensor is located in the exhuast pipe,there could be more than one sensor, maybe 4 sensors on a 6 cylinder car and 2 sensors on a 4 cylinder car,so youre gonna have to know which one is bad,if the check engine light is on it will tell you which position sensor is bad like bank 1 sensor 2 something like that,also there is NO fuse for the o2 sensors

Fig. Heated Oxygen (HO2S) location (sensor 1)-2.4L engine



Fig. Heated Oxygen (HO2S) location (sensor 2)-2.4L engine



Fig. Heated Oxygen (HO2S) location (bank 1, sensor 2) (bank 2, sensor 2)-2.7L engine



Fig. Heated Oxygen (HO2S) location (bank 2, sensor 1)-2.7L engine

I hope help you with this (rated this help). Good luck.