Question about 2005 Chrysler Town & Country

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Is there more than one sensor, ie; front and back or each side. Also would the fact that the sensor is bad make it lean to one side.

Posted by rlambright on


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I'm pretty sure there is 4 sensors one one each corner. I'll do some research and get back to you.

Posted on Aug 13, 2008


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4.0l 6 cylinder. What are the probable causes of DTC P0171?

no. (but the isc valves loves to stick but will not cause black smoke)
the 4.0L is one of 5 million made, it's well known,
the black smoke don't lie. it's rich and the cat seems burned up too.
as with black smoke the cat will try to catalyze all that and glow red hot. is your cat missing?>
so why not believe the code 171, its real and is catastrophic failure. there are 2 engines here, FED and California.(exhaust)
(2 different exhausts and sensors there.
as they say, fix what is OBVIOUSLY bad, 171
(find why using tools or inspections)
Fuel System Lean (Bank 1)in most cases the exhaust is cracked near B1S1 0xy sensor
this causes it to stick at 0volts, (lies) and the PCM sees that obvious lie then goes rich. (limphome rich)
if the pcm cant measure oxygen, it must now guess at fuel trim.(bad that.)
it goes rich, so you dont melt pistons running lean.
(by design)

bad front oxygen sensor (aka , up stream bank 1)
in calif cars, it can have a split exhaust on the I6 and have 3 sensors. (hope not yours, do look..)
most have 2 sensor, front and the useless behind cat sensor(B1s2)
S2 is useless for running mix, the rear is for smog test the cat.

so it rich, and now misfires. and the spark tips are black.
and it misfires to bad it can even idle, sure. (Drops)
the cause, is too rich.
the 171 means the PCM sees it stuck at 0v forEVER.

there are in fact other causes.
but these 2 are top cause.

on all 3 of my 4.0L engines
the exhaust manifold cracked on the under side.
side facing block. (i use a hose to ear to hear the putt putt puts, (with FULL PPE protection from burns from a dead cold engine.) ask how.
even the SST exh. man. did that.

or the header flange gasket is TOAST. (that too putts when bad.)

Aug 03, 2015 | 1996 Jeep Grand Cherokee

1 Answer

Where are the oxygen sensor locations on v6 4.0 f0rd explorer

one on each side front, one on each side back. 1-1 is right front...2-1 is right rear...1-2 is left front... 2-2 is left rear....o2 sensors are front, cat monitors are rear. btw if you have lean codes p0171,p0174 chances are the sensors are not the cause! lean mixture is the cause, which can be a multitude of causes.

Mar 09, 2014 | 1998 Ford Explorer

2 Answers

The car is shaking at 40 to 50 km/h and 90 to 100 km/h

that shaking is misfire,
the engine can in fact do that for 50 reasons.
there are 3 basic tests to find which path.
bad engine tests. (compression)
bad spark (ever tune it up in last 9 years?)
bad fueling, (too much or too little) lots of tests. to find this.....ask

1157 is lean (lean misfire is results) Oxy sensor railed lean.
Id work this first.
Id also reset the ecu, (scan tool) and drive 20 miles see if all these come back.

1009 ( just happed or ignored for long time? )
P1009 Honda - Variable Valve Timing Control Advance Malfunction0122 (my guess, been play with throttle stops, that mess up TPS calibration)
Throttle Position Sensor 'A' Circuit Low Voltage0113
Intake Air Temperature Sensor Circuit High Voltage(113 ran engine with IAT unplugged, is my guess.

Nov 12, 2013 | 2004 Honda Accord

1 Answer

My 2003 mazda v6 came up with code p2197 lean bank 2 sensor 1-air sensor signal stuck. what does that mean and where is the bank 2 located?

ECU 101;
the ECU dont know what is wrong EVER! not really!
it only know (For examp) that an input is bad. that is it.

the bank 2 front is stuck , you and take that to the bank.
but why,?
1: it's bad. (replace it)it will go bad at 100k miles , and is in the service schedule and is a fact. they dont last the life of any engine. Unless blessed.
2: that bank is stuck rich or lean. (a scan tool shows which)
(caused by big list, leaking/clogged/dead injector ; vacuum leaks, etc)RTM

ok , open FSM. (or google has 10mi +l hits on topic, )
page 1, bank 1 is left bank 2 is right.
sensor 1 is front, sensor 1 is AFR adjusting sensor.
sensor 2 is only a CAT monitor.

left means drivers perspective seated, in car.
this is rules. it's a USA standard.

i can make up good $20 sensors using Delphi parts.
at some dealers its $200 plus 1hr labor,
or if you want a PNP $ensor, then buy oen on amazon.
Bosch invented it and does sell a universal sensor that works
they have an ecatalog , its all there.
if the new sensor fails then the EFI is bad.
the scan tool can show you the facts.

now 1 more pro ASE fact (test0
we have a trick (2nd week of class under EFI)
we can force any engine lean or rich.
its not magic.
we do that and try to get the seemingly bad B2S1 sensor
to the other rail. say 0v , i force it to 1v or at 1v i force it to near 0v
this tells me the O2 sensor is not dead and that the bank has issues.
All ASE mechs know this test and saves huge money and wasted parts and labor
so you cans see that smart labor does save total costs.
also we can just do the diagnosis.
we tell you the 02 is dead.
you go home and buy a new one.
its your choice, what to do. but is it more complex than you know.
its a closed loop, understand that, and all this makes senses.
google that.

Oct 09, 2013 | Mazda MPV Cars & Trucks

1 Answer

Code po171 system too leen bank 1

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 - 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

Hope this helps (remember to rating this answer ans leave us a testimonial comment). Thank you for using FixYa.

Oct 12, 2011 | 2000 Ford F150 Flareside SuperCab

1 Answer

My 97 chevy s10 is running too lean and i cant figure out why . any sugesstions?

Most common cause of LEAN, would be vacuum leaks,& more noticeable at an idle

Next would be front or upsteam O2 Sensor, old or bad

Doubt you have a completely clogged fuel filter,or lack of fuel pressure,
but check that anyway.

You have to look at all the sensors like tps,map,egr,maf, what ever applies
& almost need a professional scan tool to do so.

How do you know it is lean?
Could be rich & computer is correcting to lean

Look at the fuel trim to see if it is either side of zero
Are the O2 Sensors switching,scan tool, as well as scope them
Need to back up one type of test with another

Under the intake ,is a fuel pressure regulator & plastic spyder type
injector arrangement, with poppet valves know for problems
That system may be on yours,I'm not sure. That usually leaks & causes
a hard start & smells etc & may be more to the rich side

Sep 26, 2011 | 1997 Chevrolet S-10 Pickup

2 Answers

The computer show's 02 sensor bank 2 stuck and to lean, which one is it their are 4 of them on this truck

bank 1 sensor 1 is driver side exhaust pipe in front of catalytic converter, bank 1 sensor 2 is drivers side exhaust pipe behind catalytic converter, bank 2 sensor 1 is passenger side exhaust pipe in front of catalytic converter, bank 2 sensor 2 is passenger side exhaust pipe behind catalytic converter.

Mar 23, 2011 | 2006 Ford F-150

1 Answer

I,m getting "ECM dected bank 1 02 at its lean

Bank 1 = drivers side (IE: 02 sensor bank1 = driver O2 sensor pre cat. converter)

Mar 17, 2011 | 2002 Ford Explorer

1 Answer

2001 ford tauraus pulled codes code p0174 says lean fuel what would cause lean fuel in this app

Its a bad oxgyen sensor bank # 2 sensor # 1it would be on the y pipe The way this is deturmend is the closest sensor to the front of the vehicle is bank #1 sensor # 1 bank #2 sensor # 1is the next in line but on the oppisite side on the y pipe its called upstream and its lieing to the computer

Nov 15, 2010 | 2001 Ford Taurus

1 Answer

What side is my o2 sensor (bank 1 sensor 1) on for 03 nissan pathfinder se with engine facing front. i need to replace it but i dont know which side to purchase.

Bank one is on the side of cylinder one. Cylinder one is typically on the driver side. Although, you have to be careful here. Just because the code mentioned the O2 sensor doesn't mean the sensor is bad. For instance, a code of P0171: sensor indicates lean, bank one sensor; one is not a bad sensor. That is a good sensor telling you that the engine is running lean on bank one. If you get a different code, then it could the be the sensor.

Mar 04, 2010 | Nissan Pathfinder Cars & Trucks

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