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post #1 of 8 (permalink) Old 04-24-2016, 09:40 PM Thread Starter
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Code P0171

Hey guys I just got a service engine light =and its code P0171 Bank 1 System running too lean. I only have 27,600 miles on my 2006 Nissan 350z Roadster GT. The previous owner only drove the car on the weekends and had taken it out a total of 4 times this year so far after the winter for only 10 mile drives and then it would sit. Would this be a MAF problem? Or an O2? The car is in immaculate condition but i think i drove it more and turned it on and off more in one day than he has this whole year.
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post #2 of 8 (permalink) Old 04-25-2016, 05:32 AM
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Could be many things.
Evidence IMO is the low miles on your car and that it was driven
very little. I'd look in the area of something that is "dirty".
Yes,MAF cleaning or a 02 sensor could be the problem.
Dirty injectors,use of poor fuel(not premium) are other concerns.
I'd dump in a additive like Techron in a full tank and run the car
at some "higher" speeds to clean it out.
I'd guess the car is all stock. Have you changed the air filters?
Another thing to try is disconnect the battery(negative terminal)and let it sit
overnight to reset things.

Again,it would seem that the problem is not from wear it is from lack of use.
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post #3 of 8 (permalink) Old 04-25-2016, 10:15 AM
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On the other hand, the CEL code is indicating a lean condition on only one side of your VQ35DE. It could be a sensor issue on that bank or a related issue. The items EuroZ has outlined are relatively cheap and easy to do, so they're a good place to start. But if the CEL persists, it's time to take your Z into a dealer and have a technician with a CONSULT III machine diagnose what the real problem is.
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post #4 of 8 (permalink) Old 04-25-2016, 01:37 PM Thread Starter
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Yes the car is stock. I just drove it for a few miles today but parked it in my driveway and covered her up. Going to take her out Friday and clean the MAF sensor, throw some Techron in a full tank of gas, and drive it for 15 miles on the highway to my buddys garage to see if we can sort things out
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post #5 of 8 (permalink) Old 04-25-2016, 01:38 PM Thread Starter
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I think a good clean of the MAF sensor and clearing the code to see if it will come up again will indicate if i need a trip to the dealer for now.
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post #6 of 8 (permalink) Old 04-28-2016, 02:49 PM Thread Starter
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Quote:
Originally Posted by EUROZ View Post
Could be many things.
Evidence IMO is the low miles on your car and that it was driven
very little. I'd look in the area of something that is "dirty".
Yes,MAF cleaning or a 02 sensor could be the problem.
Dirty injectors,use of poor fuel(not premium) are other concerns.
I'd dump in a additive like Techron in a full tank and run the car
at some "higher" speeds to clean it out.
I'd guess the car is all stock. Have you changed the air filters?
Another thing to try is disconnect the battery(negative terminal)and let it sit
overnight to reset things.

Again,it would seem that the problem is not from wear it is from lack of use.
The use of Techron wont hurt the anything it flows through with the Z? Ive heard that the Z doesnt work well with fuel additives
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post #7 of 8 (permalink) Old 04-28-2016, 07:46 PM
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Quote:
Originally Posted by uzclutch23 View Post
The use of Techron wont hurt the anything it flows through with the Z? Ive heard that the Z doesnt work well with fuel additives

Trust me,advice like--"I've heard","a buddy told me..."etc.
Otherwise,stuff based on a rumor vs real experience will get you in trouble.

Used Techron & others in my 2003 Z FOR 95K miles.
Runs fine.
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post #8 of 8 (permalink) Old 04-29-2016, 08:22 AM Thread Starter
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Quote:
Originally Posted by EUROZ View Post
Trust me,advice like--"I've heard","a buddy told me..."etc.
Otherwise,stuff based on a rumor vs real experience will get you in trouble.

Used Techron & others in my 2003 Z FOR 95K miles.
Runs fine.
Thanks man! I appreciate all the help, I wish there was a rate button on feedback!
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