No just the upstream & downstream on bank2. And maybe I am confused but when I read the codes it looks as though my issues are confined to bank2, right?

If I replace the sensors on bank1 will the problem on bank2 be corrected or do I now need to replace those too?





Thanks-

 

You need to replace all the O2 sensors.

Here is the quote from Mike:

"The 159 fault is an 02 sensor slow to respond, bank 2 sensor 2.
With your mileage, replace all 4 02's. since both banks 2 02's are acting up. it is safe to say that replacing the 02's will correct the misfire and lean issues."

And I'm pretty sure you want to replace the upstream and downstream in pairs, e.g. both upstream and both downstream at the same time.

I just turned 107k and my mileage has gone downhill real fast, so I will be replacing all 4 of mine too. It ain't cheap, that's for sure.

 

Great... I guess I read that wrong the first time and thought I was just supposed to replace both on either side not just one on any given side.

So its $300 for all 4 at Advanced Auto Parts and it takes 2 days to get them.

 

please let us know what happens... and thanks for the input on where to get them... thats a great price...

 

And these are Bosch not some knock off like Napa tried to sell me.

 

Send me your number, we should talk.

 

Alright I got all 4 new o2 sensors in this morning and the old ones were really black and looked like they were covered in charcoal dust. I then cleared the codes and started her up. She seems to be running great again so i took her out to stretch her legs for about 20 miles. Still great and idling at about 600-650rpm.

I will give it a week or two and come back and update this. Thanks for all the help Mike (& gang).


P.S. - So as I pull in the driveway I notice that my brakes are starting to squeal a little. Why can't I just have a week with no problems so I can just enjoy my LR like I did when I bought it?

 

Well Mike the problems came back and they brought more friends along as well. So I just pulled the codes in my driveway and came right in to figure this out and hopefully get it fixed tomorrow as I sold my car and motorcycle and we only have 2 trucks now between the two of us. So I have to drive this thing now...

Codes I pulled this morning:

P0174 System too lean (bank 2) Multiplication injector adaptive fuelling - lean limit
exceeded RH bank

P0150 O2 sensor circuit malfunction (bank 2, sensor 1) Front sensor RH bank stoichiometric ratio outside operating band

P0150 O2 Sensor Circuit (this one is not in my manual)

P1174 System too lean (bank 2) Additive injector adaptive fuelling - lean limit exceeded
RH bank

P0130 O2 sensor circuit malfunction (bank 1, sensor 1) Front sensor LH bank stoichiometric ratio outside operating band

P0171 System too lean (bank 1) Multiplication injector adaptive fuelling - lean limit
exceeded LH bank

P1129 O2 sensors swapped bank to bank (sensor 1) Front sensors transposed

P1171 System too lean (bank 1) Additive injector adaptive fuelling - lean limit exceeded
LH bank

P0116 Engine coolant temperature circuit/range performance problem - Signal differs too much from temperature model for longer than 2.53s

P0139 O2 sensor circuit slow response (my manual doesnt show this code)



So please help me out here. Do I need to change the injectors now too? Is this the crank sensor? I have all new O2's, plugs, and wires so what is it now???

I now have a coolant leak as well and i am going to pressure test today and figureout if its the head gasket or not.



Thanks for the help guys-

 

P1174 System too lean (bank 2) Additive injector adaptive fuelling - lean limit exceeded
RH bank

 

??? Not sure why you pointed this one out?