SYSTEM TOO LEAN BANKS 1 AND 2
02-01-2009, 03:00 PM
#1
SYSTEM TOO LEAN BANKS 1 AND 2
Ok, i have used the search forums...ive read alot but still not minimizing this...my car is throwing both these codes bank 1 and bank 2 running lean...car smells like rotten eggs once its been warmed up and up to about 85 mph or higher, before that speed i get no smell....im not noticing any loss off power except from the hole in the back of my muffler....(which is being replaced soon) i cleaned my MAF and it hasnt changed anything...this is a cali-spec maxima...so would this be my o2's my cat or what? lemme know thanks
02-01-2009, 03:07 PM
#2
Senior Member
Join Date: Aug 2008
Location: Brandon, FL
Posts: 897
Ok, i have used the search forums...ive read alot but still not minimizing this...my car is throwing both these codes bank 1 and bank 2 running lean...car smells like rotten eggs once its been warmed up and up to about 85 mph or higher, before that speed i get no smell....im not noticing any loss off power except from the hole in the back of my muffler....(which is being replaced soon) i cleaned my MAF and it hasnt changed anything...this is a cali-spec maxima...so would this be my o2's my cat or what? lemme know thanks
Last edited by Nelsito65; 02-01-2009 at 03:10 PM.
02-02-2009, 06:06 AM
#9
Another one with no clear answer.....
i been on this subject for about 2 months with no clear indication, i get same issues, I replaced all O2 sensors, i havent gotten it in awhile but i do get nasty rotten sulphur smell when i pull hills, my next step is the MAF , but the car is running and driving fine.
i been on this subject for about 2 months with no clear indication, i get same issues, I replaced all O2 sensors, i havent gotten it in awhile but i do get nasty rotten sulphur smell when i pull hills, my next step is the MAF , but the car is running and driving fine.
02-07-2009, 06:47 PM
#13
Newbie - Just Registered
Join Date: Sep 2008
Location: Fall River, MA
Posts: 3
i once had the same code (PO171 bank 1 system too lean) and turned out to be the MAF sensor. I had it replaced but it was semi costly for a new one + labor ($350.00). I had it replaced on the the LAST day of a 60 day warrenty 
lucky me.
no problems since then...
lucky me. no problems since then...
02-18-2009, 11:45 AM
#15
Member
Join Date: Jun 2006
Posts: 51
I'm having the same problem, I will try replacing the MAF if I can find a cheap one.
Anyone else got any more insight on this?
02-18-2009, 02:55 PM
#18
Member
Join Date: Jun 2006
Posts: 51
02-19-2009, 08:27 PM
#22
Member
Join Date: Jun 2006
Posts: 51
I should be getting a new MAF tomorrow and get it reprogrammed, I will report back on how the car reacts to it.
My car also gets the rotten egg smell after hard pulls, which made me think the cat is bad, and it failed emissions testing (CO, which points to running rich or a bad cat). I will see how it does with the new MAF
My car also gets the rotten egg smell after hard pulls, which made me think the cat is bad, and it failed emissions testing (CO, which points to running rich or a bad cat). I will see how it does with the new MAF
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