Nissan GT-R Forum banner
1 - 20 of 44 Posts

·
Registered
Joined
·
639 Posts
Discussion Starter · #1 ·
I called Cobb tuning today about CEL's and 2012 GT-R's and was told they are getting complaints of CEL on just mid pipe. No issues on ealier models, just the 2012's. I was told there would be a good chance( at least 50%) of a CEL with just a mid pipe and I would need a tune or relocate the O2. I know a few 2012 owners on this forum had some issues with just a mid pipe . What is it about the 2012 's ? I was all set to do just a mid pipe( for sound) as I do not want any warranty issues, but now I do not know what to do.
 

·
Founder/Admin
Joined
·
26,252 Posts
ive got a pipe coming im installing friday... i cant see how it would cause the CEL light

i dont understand relocating the 02s as they are before the midpipe... where would you relocate them to? they are already in the downpipes
 

·
Premium Member
Joined
·
982 Posts
Yep no issues either . Iv had a mid pipe on my 2012 since day 1
 

·
GTR Nerd
Joined
·
5,335 Posts
We have installed several on 2012's and have not had any CEL.

They are on the far side of each of the 02 sensors, so I can't really see how they would be causing a code.

Most codes are set by the "I didn't tighten the gas cap".

Are you sure you didn't ask someone about downpipes?
 

·
Registered
Joined
·
639 Posts
Discussion Starter · #5 ·
ive got a pipe coming im installing friday... i cant see how it would cause the CEL light

i dont understand relocating the 02s as they are before the midpipe... where would you relocate them to? they are already in the downpipes
Let me guess, Stillen mid pipe ? Good luck and enjoy. I am just going by what I was told by Cobb.
 

·
Registered
Joined
·
639 Posts
Discussion Starter · #7 ·
If somone wants to call Cobb tuning and ask more questions please feel free. I would like a definite answer on the CEL issue with only a mid pipe.
 

·
Premium Member
Joined
·
982 Posts
My mid pipe is hand made and non resonated and their was only 1 focus when my friend did it and it's air flow . So nothing special with mine and beer throw a code on 2 cars
 

·
Registered
Joined
·
639 Posts
Discussion Starter · #9 ·
We have installed several on 2012's and have not had any CEL.

They are on the far side of each of the 02 sensors, so I can't really see how they would be causing a code.

Most codes are set by the "I didn't tighten the gas cap".

Are you sure you didn't ask someone about downpipes?
The way it was explained to me was, removing the secondary cats increase in flow throughout the system occurs. More gases pass through the O2 and you get a CEL on the 2012's is a 50% chance of CEL . Again this is what I was told by Cobb on the phone. I wish it were not true as I want to wake up the sound of thr GT-R.
 

·
GTR Nerd
Joined
·
5,335 Posts
The way it was explained to me was, removing the secondary cats increase in flow throughout the system occurs. More gases pass through the O2 and you get a CEL on the 2012's is a 50% chance of CEL . Again this is what I was told by Cobb on the phone. I wish it were not true as I want to wake up the sound of thr GT-R.
I am checking into it with Cobb. I don't remember seeing anyone saying they had an issue on here, can you find the threads for me?

Airflow though the system is measured by the MAF. On the back side are two sets of 02 sensors. The 02 sensors don't measure flow, rather they measure more or less- oxygen content in the exhaust gases. Both are 5 volt sensors that vary vs the particular inputs they see. So they work within a range.

While anything is possible, its not very likely in the case of replacing a midpipe.
 

·
Founder/Admin
Joined
·
26,252 Posts
I am checking into it with Cobb. I don't remember seeing anyone saying they had an issue on here, can you find the threads for me?

Airflow though the system is measured by the MAF. On the back side are two sets of 02 sensors. The 02 sensors don't measure flow, rather they measure more or less- oxygen content in the exhaust gases. Both are 5 volt sensors that vary vs the particular inputs they see. So they work within a range.

While anything is possible, its not very likely in the case of replacing a midpipe.
he is talking about this poll

http://www.nagtroc.org/forums/index.php?/topic/63016-midpipe-ramifications/
 

·
Registered
Joined
·
187 Posts
i think out of those 2 yes votes only 1 was 2012
Well I had a CEL 1 month after purchase (without a midpipe) caused by a faulty gas cap. The seal was visibly defective. It was replaced and no problems since. At first they thought it was the evap sensor, but after changing it the CEL came back.
 

·
Registered
Joined
·
284 Posts
Yeah, I started the poll. My car is a real 2010 not the NA 2010.

Nissan sya that they will not investigate further unless I remove the midpipe and then get the cel again. The error is related to o2 sensor on rhs engine bank.
 

·
GTR Nerd
Joined
·
5,335 Posts
Yeah, I started the poll. My car is a real 2010 not the NA 2010.

Nissan sya that they will not investigate further unless I remove the midpipe and then get the cel again. The error is related to o2 sensor on rhs engine bank.
Yours is a good indication of someone pointing a finger everywhere but themselves. Its easier to say "not my problem", than actually investigate it.

If the car were in front of me, I could figure it out, and fix it, midpipe or not. However if what they want is to pull the pipe, I would take the 6 bolts off, put the old pipe back in, and then take the car in for them to fix.

Do you know the exact trouble code?

The front side sensors are called A/F sensors, and the rear sensors are called Heated Oxygen sensors.

An 02 sensor failing, is not coming totally out of the ordinary. Parts, electronic parts, and electronic parts that see 1000F fail.

White Product Font Rectangle Line
 

Attachments

·
Registered
Joined
·
284 Posts
Sean, problem is that my car "lives" 600klm from the dealer and code comes up infrequently ie. since last cleared, the car has done 700 klm and been used for 10 days untill it came up again yesterday.

Whats he deal with the gas cap loose & cel?

Car is going to Adelaide (where dealer is) over Xmas. Will prob pull pipe then.
 

·
GTR Nerd
Joined
·
5,335 Posts
Sean, problem is that my car "lives" 600klm from the dealer and code comes up infrequently ie. since last cleared, the car has done 700 klm and been used for 10 days untill it came up again yesterday.

Whats he deal with the gas cap loose & cel?

Car is going to Adelaide (where dealer is) over Xmas. Will prob pull pipe then.
Here in the states you can go to any little auto parts store, and they will bring an OBD II scanner out to the car and read/clear codes for you, normally for free.

There is actually a way to read and clear it without a scan tool, but you have to be a little deft in the foot.

http://www.2009gtr.com/2009/12/how-to-read-and-clear-codes-without.html

Gas cap and Evap system are related to the emissions control system. When fuel is heated it gives off vapors. Due to emissions regulations, these vapors are not allowed to be released to the atmosphere. They are collected by the charcoal canister, and eventually burned in the engine. In order to make sure the system is sealed, there are measures to detect leaks. If the system detects a leak, then you will see a CEL light . Without a scanner, without reading the code, you aren't going to know what the actual code is. Something as simple as the gas cap being loose can throw a CEL. It has been though, a common issue to have some EVAP system failures in GT-R's. The early cars did, but some later cars have also had issues.

The car is telling you what is wrong, talk to it, and you can fix it.
 

·
Registered
Joined
·
66 Posts
What is cell? Check engine light?
 
1 - 20 of 44 Posts
Top