02 sensor plus other issues, info much appreciated

[Marshall206]

So I have found that bank 1 sensor 2 is bad from a few tests, it is the driver side rear 02 sensor

Infinity of Kirkland wants $241.41 for the part

I also have engine code p1320 on which says, ignition signal in primary circut is not sent while engine is running or cranking

its says possible cause could be:

harnesses and connectors

power transistor built into ignition coil (plz clarify this one, dont understand what is means)

or camshaft postion sensor or sensor circut

The Q, is misfiring horribly, TCS and Slip lights come on as soon as engine is running as the misfire begins, and very sluggish when driving.

I would say o2 sensor first, as this could cure the misfire alone, but the camshaft postion sensor seems like a likely problem.

My question is... is the o2 sensor a good place to start? its not cheap, not terribly expensive either, or should I start with something else?

Also, in your opinion, does it seem like I have many issues and repairs will be very high $2k + ?

The Q is very cosmetically nice, except a small crack in front bumper, 110k 2000 aniversary, tein springs, full maple wood package, white/gray two tone, interior in perfect shape, in dash, headrest screens, 4k in sound. So you can see I dont want to give up the car if I dont have to, I love it, and if I tried to sell the way it is Id be lucky to get the money spent in aftermarket back.

Like I said any advice very much appreciated, and if ANYONE knows why the TCS and Slip lights come on w/ misfire (seem to be related, as wierd as it sounds) I would love to know, searched forums many times, but no solution posted for this problem.

Thanks,

Bjorn - Seattle

[elwesso]

the o2 sensor isnt going to fix the problem. I think you can get the sensor from sparkplugs.com for much cheaper!

My first thing Id try is cleaning the connector on the cam angle sensor... The sensor and harnesses rarely cause any issues, but this sounds like an intermittant connection issue..

Else, you could be looking at one or more coils going bad.. Do you get a misfire code on any cylinders?

[Marshall206]

No misfire code, which is weird, but the car is not running on all 8 cyl.

Also seems to be running rich which could be o2 sensor I guess.

What is the best way to test the coil packs? and where can I get them cheaper then dealership prices

And I still have no idea whats going on with the TCS Slip, but when the misfiring very first started happening the TCS and Slip always came on with it.

[Marshall206]

if I need the left rear o2 sensor, then I want after cat, correct? just want to be 100 percent before I order

[Marshall206]

By Cam angle sensor, are you refering to the camshaft position sensor?

I dont see any cam angle sensor in the FSM

[maxnix]

By Cam angle sensor, are you refering to the camshaft position sensor?

I dont see any cam angle sensor in the FSM

Yes, but don't replace the expensive catalytic converter unless you are certain it has failed. Do not use 3rd party after market unless you want a very short life.

[Victor]

I read in the FSM that under normal operating conditions the information from the second O2 sensor is not used for engine management, maybe that's why some say these faults are false faults and it is really something else. However the FSM didn't say when the information from the rear O2 sensor is used. My daughters car had the same fault, but her car engine seems to run fine, and the fault could be reset and stays away for a long time.

[Marshall206]

Yes, but don't replace the expensive catalytic converter unless you are certain it has failed. Do not use 3rd party after market unless you want a very short life.

Why would I replace the cat? its just the o2 sensor as far as I know

And is the "yes" it is the same sensor (cam angle/ cam position) or yes, the drivers side rear would be the o2 sensor on the left after the cat?

And ya the FSM says the o2 sensor is not used once engine is running, but it still tells the ECU the fuel/air ratio of whats coming out so it can regulate, doesnt it? I could be wrong, but either way I cant pass emmissions with a bad o2 sensor.

The problem was coming rarely and going away like it would fix itself, but now its every time I run the vehicle.

Any help very appreciated, thanks guys!

[Q451990]

The O2 sensor could be a false fault code. I would fix whatever is causing the miss before you make a call on the sensor. A bad O2 sensor will not cause the engine to run this poorly... the ECU has default maps that it can use that will keep your car running fairly well, even if the O2 sensor is completely disconnected.

The rear O2 sensor is used by the ECU to make sure that's what's coming out of the cat. is the correctly modified from what the front O2 sensor just saw. It is just a check to be sure the cat. is working.

For OEM Parts - You can get them cheaper at http://www.everythinginfiniti.com

For the O2 sensors (if you find that you need them) you can get discounted replacements at http://www.sparkplugs.com

The coil packs seem to be the common problem on the Y33 series of the Q45.

Heath

[Marshall206]

Ok so im going to do the coil test first, was it a drop cylinder test that I need to do? I have a basic code reader, not too fancy but not super cheap I think it was $200, bought it last year. So if anyone knows, what is the name of the test I can do with the code reader to start to find which cylinder is misfiring, keeping in mind I dont get a misfire code,

Once I had at least a good idea of which cyl is bad, then I remove that coil pack and transfer it to another cyl to see if problem persists.

So I guess what I need to know is where in the FSM can I see some schem or pics of this, have looked through a bunch of it but I havent found it, or better yet is there a thread on this forum of a walkthrough with pics? that would be cool.

On everythinginfiniti.com, I found coils for $78 couldnt locate coil packs, seems a little too cheap, I thought a whole set of 8 was around $1800

Thanks again

[elwesso]

youll sometimes hear people on hear call the cam position sensor different names, but they are talking about the same thing....

I think that if it was a bad code by the misfire the o2 sensor would code would be on the front sensor, not the rear sensor.. The rear sensor basically just makes sure the cats are working...

I agree with Heath though, I would probably try and trace down the problem with the 1320 code before you mess with the o2 sensor, since the rear o2 sensor isnt going to affect driveability.

[Marshall206]

ok thanks, I know where to start now, coil packs

are the ones on everythinginfiniti.com for $78 not the correct ones? or is it just multiple coils per pack?

[Q451990]

One $78 coil pack per plug, eight per engine.

Heath

[Marshall206]

Thanks Heath, I just was reading other posts about people looking to buy a new/used set for $1500 so I was a little thrown off by the $78

So after a lot of reading on here, im just gonna replace all 8, they are rated for 100k, so why replace the bad one

I think this will fix much of what is going on with the car, but well see

If the Q was being driven for awhile while the misfire was on and off and the sluggish driving was coming and going, is there any way I could have made things mush worse?

Another question, maybe without another thread,

My front struts are blown, (when I take them off theres no fluid inside/seals blown) can I order individual parts and reseal?? or do I have to buy new struts, everythinginfiniti.com has the individual pieces but has anyone on here resealed their struts before?