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-   -   Problems P0161 & P030 WJ (http://www.jeepgarage.org/f203/problems-p0161-and-p030-wj-6573.html)

Hac_PTR 02-14-2010 11:44 PM

Problems P0161 & P030 WJ
 
Need help

Iím getting this codes on my Wj 4.7 HO 2002 Overland:
P0161 O2 Sensor Heater Circuit (Bank 2 Sensor 2)
P0303 Cylinder # 3 Misfire

:confused::confused::confused:
when my WJ is on Parking I can feel a litle of shake or small vibration, definitely something is not working right:
What Can I do?
I already replace Spark Plugs and nothing happen.
I was wondering if, first I need to test Oxygen Sensor, but I do not how to test.
Or any idea?

Scottina06 02-14-2010 11:54 PM

Re: Problems P0161 & P030 WJ
 
did you maybe break the bolt or not tighten the bolt on the #3 coil? Did you gap the plugs? Sounds like the #2 02 sensor needs replaced. Use only the oem 02.

Chaoul1 02-14-2010 11:56 PM

Re: Problems P0161 & P030 WJ
 
Change the O2 Sensor. Like Scott said above make sure you get an OEM one.

Hac_PTR 02-15-2010 12:37 AM

Re: Problems P0161 & P030 WJ
 
Scott & Paul thank you for your prompt response"
Scott Yes all the nuts and wires where connected in the same way it was before I removeed the spark plugs.
I didn't check the gap on the spark plug, I will check tomorrwo, what is the right Gap?
On the other hand Do you now if there is any way to test the sensor before replace it? and which on of the O2 sensor I will need to replace?


Sorry for many questions but I'm a beginner on cars!

Gracias !

Scottina06 02-15-2010 12:41 AM

Re: Problems P0161 & P030 WJ
 
sorry bro.....Im not sure of the gap on the ho 4.7...but I will try to find it. Also check the coil on #3 as well....it could be bad. Send a pm to sleepy4.7 about the 02 sensor. Im not sure where the #2 02 sensor is on the 02 4.7 ho. Sorry Im not too familiar with the WJ exhaust set up.

Scottina06 02-15-2010 12:46 AM

Re: Problems P0161 & P030 WJ
 
here ya go bro....
http://www.wjjeeps.com/service/sparkplugs.htm

dont use a wire-type gapping tool. Use a tapered-type gauge. The Gap specification is 0.040 for the 4.7L HO engine.

Scottina06 02-15-2010 12:47 AM

Re: Problems P0161 & P030 WJ
 
check this for the 02 sensors

http://www.wjjeeps.com/oxygen.htm

Hac_PTR 02-15-2010 02:01 PM

Re: Problems P0161 & P030 WJ
 
????

Scottina06 02-15-2010 02:25 PM

Re: Problems P0161 & P030 WJ
 
Quote:

Originally Posted by Hac_PTR (Post 151234)
????


can you not view the wjjeeps.com pages? I pulled the gap info here...but there are pics showing the 02 sensor locations on wjjeeps link I posted

Rich 02-15-2010 03:57 PM

Re: Problems P0161 & P030 WJ
 
Quote:

Originally Posted by Hac_PTR (Post 151034)
Scott & Paul thank you for your prompt response"
Scott Yes all the nuts and wires where connected in the same way it was before I removeed the spark plugs.
I didn't check the gap on the spark plug, I will check tomorrwo, what is the right Gap?
On the other hand Do you now if there is any way to test the sensor before replace it? and which on of the O2 sensor I will need to replace?


Sorry for many questions but I'm a beginner on cars!

Gracias !

I think you can test O2 sensors with a multimeter, though not sure of proper impedance? anyone?

Rich 02-15-2010 04:04 PM

Re: Problems P0161 & P030 WJ
 
Ok I was wrong, should be looking for voltage change not ohms...

See:
http://mr2.com/TEXT/O2_Sensor.html

Hac_PTR 02-18-2010 05:58 PM

Re: Problems P0161 & P030 WJ
 
Just to let you know °
I went with my mechanic and we found that 1 head was crack, unfortunately.

The miss fire codes was because the coolant was leaking in to the cylinder and it looks like the code of the O2 is because is reading humidity.
We remove the spark plugs from Cyl #3 and #5 and they were with residues of Antifreeze.
I didn’t notice but the coolant from my radiator start to go low and it was because of the leak.
The repair will cost me around $500.00 USA dll!
I will not replace the O2 until I have my rebuild cylinder heads on !


Thank you all four your support and comments !


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