As u can see the pic above is there some thing wrong with fuel trim
i know i have a problem with o2 sensor
and i have pending fault code with all sensore (lean)
And the 2x2 sensor is not working coz the wires cut it

so what those number shud be for better fuel economy

 

Dude, what kind of mileage are you getting?

I'm so confused as to what you want to accomplish. Why don't you start by fixing the O2 sensor.

 

I dont find o2 sensor in spare parts shop
Xj gas 6 cly 2000
About mileage i get only 260 mile overflow tank

 

How bout you fix your o2 sensor and then see what your looking like

 

O2 sensor voltage goes up and down, so maybe his 4 sensors are fine.

 

Slightly off topic, but where are you getting these readings from?

 

Definitly fix o2, that will change fuel trim alot.

 

funky readouts.. like everyone else says, fix the o2 sensors. never use Bosch, jeeps dont agree with them. NAPA carries NTK brand sensors i'd go with them if your trying to save some $$

 

I think it's getting kilometerage???

 

For reference on Renix years Bosch is the only one that runs right. 91+ is NTK only

 

Thanx guys i will fix all o2 sensors soon and yes its kilometerage
I get these numbers from obd2 bluetooth connector with galaxy moblie very cheap obd scan
So today i get fault code with 1x1 sensor lol zero volt and 2x2 zero volt too
So u guys prefer NTK sensors
I think i will try clean them and see checking with obd2 if not i will try to change them all
I just want to know are they the same or not coz all them has 4 wires

 

Please tell me how an Inline 6 cyl engine has two banks of sensors lol. you have 1x1 and 2x1 thats one bank and then 1x2 and 2x2 is another.. since when was the 4.0 a V6 with two upstream and two downstream O2 sensors. on a second note those o2 readings are fine for the stock narrow band sensors they fluctuate fast from rich to lean to control the trim. unless you have a wideband sensor and gauge you are not reading an accurate measurement of AFR..

now if you are seeing those voltages and they are stuck. not changing at all then you will have a CEL and a bad sensor. if you have a lean bank it is more than likely a bad upstream o2 sensor

 

2 sensors stuck with zero voltage now i just pull the connector and put it back again and cel is on now
Even throttle sensor get high voltage with code p0123 coz i pull off connector and put it back again
I pull off postive battery for 30 sec but nothing change same fault code even throttle sensor but the car is fine no rough good ignation nice acce
Crazy pcm lol
I export the jeep from USA to Saudi Arabia

 

2000 and 2001 have O2 sensors installed before and after two pre-cats in the exhaust manifold itself. It does not have any sensors surrounding the main cat.

Manifold:


Downpipe:

 

Yes i know and i try to clean them first and check them via obd2