Service Engine code P2097
 

I got a couple of codes today on the way to work. P2097 (Post Catalyst fuel trim system too rich bank 1)and a P117A?? I am running K&N filters with the silicone HPS's tube inserts. The car has only 3200 miles. But ever since I put the tubes on and reconnected the battery my milage has dropped 2-3 MPG.??? Has anone had this issue? Do I have to take the HPS's off before hitting up the stealership?

I have read in a Nissan forum that a O2 sensor has gone bad. Is this a fluke or does it have to do with my tiny (K&N/HPS) mod?

I'd get an OBD/CAN reader and see what the O2 sensors are doing. If anything doesn't look quite right, put the stock parts back on and see if that makes things any better. If it's still throwing errors with stock parts, take it to a dealer (you've already got the stock parts back on, so that's no longer an issue).

Edit: And check to make sure you didn't knock any wires or hoses loose when you made the mods.

I have the reader. What exactly am I looking for? Is there a voltage chart or something?

I'm sure hundreds of people have used the K&N filters with the HPS silicone tubes without issue. Anyone had this experience?

The HPS instructions say to disconnect battery when installing. So I did and after reconnection it ran fine for a couple of weeks but I just noticed a drop in mileage.
http://www.hps-siliconehoses.com/med...6BLUE_370z.jpg

Can anyone read this?
 

Can anone tell me if this data looks right?
Attachment 94271

The normal/expected values are in the FSM. Or someone who knows more about this than I do will probably chime in soon.

Not having much luck in the chiming dept...

Just give it a lil time ...... Wish I could tell you on the numbers

P117A is Engine Oil Over Temperature (Forced Limited Power) -- that's an unusal one...

P2097 looks to be associated with a bad secondary (post cat) O2.

Do you have factory cats?

The weird array of errors makes me think its an electrical problem... failing that, there's a couple of possibilities, at least in regard to the rich system code.

1. You have a massive vacuum leak and the ECU is adding tons of fuel to try and compensate. Check all hose connections.

2. Your MAF sensors, if they were removed got dirty or are somehow improperly installed. If they were never taken off and all connectors were left alone, skip this.

3. Something entirely coincidental happened and your primary and or secondary O2 sensors on Bank 1 failed.

None of those explain the oil temp code -- were you even seeing temps on the gauge that were high?

Thanks for the response Jordo.
I am running stock air boxes and the silicone tube inserts. I checked the fittings and they are tight at the air box and the TB. The small tubes that go to the valve covers look good too. The engine has never been run hard enough to get hot let alone real hot, so that code must be bogus. I am running K&N filters, could it be oil on the MAF sensors? If so how can I clean them?

PS Did you look at my data logs? I cleared the codes and am driving now without codes yet.

A bogus code points to an electrical problem tho... you shouldn't just get random codes like that.

Can you export the datafile to excel or put them into tables?

The data file came out as a txt file. It is up a coupe of posts, did you see it? The code came back after about 80miles. I called the Stealership, i guess I have to get the stock tubes back on. CRAP!

yeah unfortunatley those are odd codes in more ways than one niether applies to the 370z at least not according to the 09 manual engine oil over temp is p1217, you're other code doesn't apply to our cars either, going to have to have consult3 hooked up it is most likely a code translation error.

On other 2014 models the the p117a is cylinder a/f imbalance and p2097 is rear o2 sensor problems back to stock and to the dealer you go.

It's hard to follow displayed as text instead of in a table, but it looks like you are getting pretty divergent readings from the MAF sensors.

I'm not sure about the different sets of fuel trim data - the first grouping look nominal but the ones listed later are high for one bank

It's possible the MAF sensors need to be cleaned -- pick up some CRC MAF cleaner spray and just spray them down.

That still doesn't explain the weird DTC's... I think after trying to clean the MAF, if no change, going to the dealership is your best option.

I can tell you that the tubes and filters are NOT radically changing things enough to cause sensor problems.

Over oiling could be an issue on the MAF, but if you spray it clean and nothing changes, there's something else going on.

O2 Sensor Issue I Think...
 

Yay, first post here for me!

Just had a similar issue on my '14 Base Sport Coupe. Took it to the dealer and they said that there was an O2 sensor part number change around the time when my car was built (early Jan, 2014) and my car had three correct O2 sensors installed and one wrong sensor installed from the factory. (Old part number...) My car tripped the P2099 code which is the same as yours but the other bank. I have 2600 miles on it. Bone stock.

Wonder if you have the same problem I do? The new part is backordered at the moment.

Good luck.

Great start! :tiphat:

The new part number is backorded? Did you get the car back while waiting? Since it sounds like I have the same issue and need a car.
Somethng funny the service rep said when I told him the car had K&N filters. " I wonder if the oiled filter could have damaged the O2 sensor.":shakes head::rolleyes:
I said , "Uh maybe got oil on the MAF but I didn't see any with visual inspection and certianly didn't effect the O2 sensor..."

Looks like this service dept might be trouble...

Good bye easy trip to the dealer for warranty work next time you'll shut your mouth and get it done for free.

I asked the same guy if a CBE would be ok on the day I bought it and he said it should be fine? :confused:

On the day you buy it they will tell you whatever you want but you didn't get it in paper did you now?

I've got the car back and was told it was okay to drive until the part comes in although since it is my second car and not my DD, I have not put many miles on it with the service engine soon light on. Also haven't beat on it in case the cat temps are out of whack.

You really need to simply hand over the keys next time and not say anything about your mods if you don't take the car back to stock before going to the dealer for service.

Yea, I will keep everything on the down low from now on. I got the car back with the same story you had. Part is on order p/n 22693-3RC0A. Wonder how long this will take? I also worry about fouling the plugs on that bank if it is enough to effect the mpg.

Eh, I wouldn't worry too much about the plugs. Remember, the wrong O2 sensor is just reading slightly out of range on one side compared to the other. If anything the engine may try to adjust for the apparently rich condition by running a little leaner than usual. But overall I don't think you'll hurt anything else by driving it, just keep it below half throttle and below 3500 rpms to try not to put too high of a load on the engine while the fault is active. My concern right now with my car is more related to catalytic converter temps, not the plugs.

Judging from my past experience with the Nissan dealer, it will probably be at least a week, maybe two before the part will be in. Drive it easy till then.

I presume a rich condition is way better than a lean condition. Wouldn't that also be easier on the CAT? I had a stretch where the MPG just started dropping like a rock. I used my scanner to reset the code and it seemed to stabilize. I have a truck to drive too but I am getting tired of its 14mpg.
Thanks for the input have a great one!

Backordered Sensor Came In
 

Dealership called me yesterday; O2 sensor is in. Getting it installed on Monday. Will update with results next week.

look for exhaust leaks. my dealer replaced o2 sensors to no avail and it was just leaky HFC gasket. Z1 sells a all metal one that seems pretty good for about 45 bucks.

Good call. Will do.

Lots of knowledge in here. Good forum.

My part is in also in and goes on tonight. I wonder if they will give me the old part?

Depends. I can just about guarantee that they won't say yes if you don't ask. ;)

Let us know if it fixes the problem! Glad to hear your car will be fixed soon!

All fixed...
 

Got the new (correct part number) O2 sensor installed today. Everything seems back to normal now. Fuel mileage went way up too. Was getting ~23MPG with the check engine light on, now I am back to ~25MPG again.

:tup: :driving:

Service Engine code P2097
 

Awesome !!! Keep us posted !!

Do you happen to have the p/n that was replaced in your Z? I am doing some research. Apparently there is more than one fix depending on manufacture date.