im just wondering cuz i threw a code for bank 1 sensor 2, after the cat, and i can hear some pretty bad pinging- (kinda sounds likea bunch of small rocks being knocked around faster as the RPM's go up) .. so i was just wondering if these were related .. thanks in advance

 

No. It's responding to something happening upstream and in itself it can't cause the pinging. If it was just the code for the sensor then it might be the sensor itself but the detonation/pinging means something ain't right with the combustion process. Has any work been accomplished on the engine recently and you're sure this is the only stored code?

 

Ditto, due to the bad o2 your max is going to swallow more gas, since the o2 regulates the gas and air mixture.

 

What fuel are you using?

 

thanks for the response P samson--> but no work has been done recently,.. a few months ago i changed 2 coils and i put 6 plugs in it,.. but everything was running fine since then, this is a new thing,.. and yeah that was the only code thrown... so im stumped,.. guess i gotta change the O2 and go from there ,.. and yeah i can see bad MPG due to the wrong A/F ratios that the o2 is throwing

2 more ?'s = is this an easy DIY? and can i just get a sensor from advanced auto, or should it be nissan?

 

i always use 93

 

I didn't explain myself properly. There probably is a connection but the REAR O2 is only responding to an issue and NOT not the cause. The rear sensor (the one in this Fed. Spec. two in all others) is not involved in the direct feedback to the ECM related to the fuel delivery. That is the function of the front O2 sensors. The rear(s) are more like "verifiers". I suspect because you have the pinging that the engine is running lean at times which can aggravate pinging. The rear O2 sensors will sense too much O2 coming out of the cats due to the lean mixture. Could be air leaks in the intake or not enough EGR. I suspect that you have or will see other fault codes eventually. I doubt that your knock sensor is the problem. What was the code?

 

i dont remember the code i know it said bank one sensor 2 ,.. was it p1401? maybe? i honestly dont rememeber,.. but i know that was the only code thrown,.. and i guess ill just have it checked again soon and see if anything else comes up,. thanks again for ur knowledgeable info.

 

The problem would be bank 1 sensor 2. I have that problem every now and then, its normal wear and tear especially after 80k miles. If you can get access to a lift and get under there with the right tools it shouldn't be a problem. It is a tight space to get to with the tools. U may have problems turning the o2 sensor. But once you get the sensor out make sure you have some anti seize to put on those treads. You can get the o2 sensor at a advance auto, or auto zone.

 

Good plan. Take your Emissions Warranty info with you. It may end up being covered, particularly if the dealer is kosher.

 

If you do this bring some fuel receipts with you too. If not, they're probably going to tell you to try 3 tankfuls of premium fuel and then come back- hoping you never do.

 

great advice ,.. i woulda never thought about fuel reciepts

 

If you can gain access to a scantool check your fuel trims. I'm surprised that you haven't set a bank 1 code yet.
From what you explain it sounds like detonation. Be carefull, while detonation in itself can cause engine problems it can also cause pre-ignition. Pre-ignition can kill a motor VERY quickly and is hard to hear.

I see you just swapped your plugs a few months ago. Did you put OEM plugs back in? (NGK platinums IIRC) Do you have an intake system? Is your motor running hotter than normal? Are you burning any oil? ETC.

 

I figured you was gonna do the job yourself. If ur going to the stealership, be prepared to b 1. pointed into the wrong direction. 2. A$$ raped by the price their going to give for everything. or 3. disappointed by their innate skill to "fix" something that didn't have a problem to begin with.

 

I thought you had replaced all the coils but I see that it was only two. Could be another coil crapping out.

 

yes i put the OEM plugs back in,,.. no my intake is stock,..motor is running at normal temp. and i havnt lost a drop of oil and im about 1700 miles since the last change

Just realized that i replaced 3 coils not 2 ,.. from the front 3 cylinders,.. sorry

ok so.. the light was on for about 1.5 weeks ,.. and today it randomly went off and i didnt do anything.. and the pinging / detonation has completly gone away? now im really confused i know the ecu cycles the codes ,.. could this be it or am i lucky ? should i expect to see it again soon? any ideas

 

Obviously intermittent and a pain in the you know what. A coil "going south" can definitely be an intermittent thing. Will probably crop up again. So the pinging has stopped as well? Did the engine ever have a miss like maybe at idle?

 

yeah no more pinging or anything,.. seems to run perfect,.. the only time i ever had a miss at idle was when i threw a code for bad coils,.. i hope its not coils again,.. i shoulda just replaced all 6 instead of 3,.. oh well,..guess its time to be patient and see what comes next.
thanks for all the responses P. Samson ,.. you have been very helpful

 

U will see the code again. The same thing happens to my Max when the o2 sensor goes bad. Whats the mileage that you currently have on the odometer. If ur anywhere over 80K changing your o2 sensor is a must.

 

yeah thats funny you say that cuz im at 75K ,... when i bought the car (a little more then a year ago / 15K ago) they replaced the cat and one or 2 of the o2 sensors.. but im guessing the ones after the cat are original... so looks like o2 sensor(s) here i come ... thanks

 

Quite cool I must say.

 

What!?

 

i think Someones tryin real hard to hit that big 1 5 to be able to start new threads

 

My rear bank o2 sensor just crapped out on me, and i have <45K on my max. Just had it replaced this morning at the dealership, under warranty of course.