2010 Nissan 370Z 370Z service engine soon

Tiny
KRCOURVILLE86
  • MEMBER
  • 2010 NISSAN 370Z
  • 6 CYL
  • AUTOMATIC
  • 47,000 MILES
My 370z service engine soon is on and I went to get it checked with all the diagnostics ran. The guy at the Nissan dealership stated the part does not exist on the car. And stated whomever put the aftermarket exhaust pipes in must have reprogrammed the database (or something like that) bc their machine was reading a code that does not exist. My car drives just like normal everything is working perfectly. And then he tells me he can replace the aftermarket parts for 1500 and then just mybe figure out whats going on. I dont know what to do to be honest, any thoughts?
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Saturday, May 9th, 2015 AT 5:47 PM

2 Replies

Tiny
DRCRANKNWRENCH
  • EXPERT
That is very interesting. When adding an exhaust there are a few things that can be changed that can make things different or leave things in working order. For example, you may have heard of cat back exhaust where the exhaust is only aftermarket beyond the catalytic converter. This generally leaves all the oxygen sensors and other forward cats unchanged and seldom causes problems. The big issue is not negating stock sensors. This gets to be more and more of an issue as cars have more and more sensors and they become very sensitive to changes. Dealers do not like when cars get modified under warranty as it generally voids it and makes diagnostics very hard. Diagnostics is generally the most labor consuming part of servicing a car.
I am intrigued by the "part that does not exist" remark. I am assuming you are talking about a Nissan dealer telling you this. If it is not, I would get an opinion from a Nissan dealer, but not until you call the aftermarket exhaust manufacturer and get them to explain what is going on. Also, go to an Advance Auto or Auto Zone and get them to read the codes and see what comes back. It is not quite as exact as other code readers but it might give you something to go on when you call the exhaust manufacturer.
Let me know how it goes and remember, try to get all the info you can before going after Nissan. Also, some dealerships are kinder than others.
I will keep an eye out for your reply.
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Saturday, May 9th, 2015 AT 8:02 PM
Tiny
WRENCHTECH
  • EXPERT
Let me throw a guess in here.

It's quite common for people to install performance exhaust systems that eliminate the Catalytic Converters. When they do this they often include different types of modifiers that fool the computer to prevent the check engine light from coming on in response to having no converters. They often call them 0/2 eliminators. It can be something inserted into the 0/2 plug or actual program Mods.

The dealer should be able to re-flash the computer to restore original programming.
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Sunday, May 10th, 2015 AT 6:00 AM

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