P0171 CEL - Due to tuning?

LEGGT · 03-31-2005, 06:53 PM

Hi,
Today I drove out to lunch, stopped to get some gas and my CEL came on.
I checked it at Autozone and it is a P0171 code.
I don't have a CAI, just the stock airbox. Do you think the error could be attributed to my dyno-tune/reflash last Friday? It is much warmer today and the Santa Anas are blowing. So I don't know if the outside temp or the wind conditions have anything to do with it. I disconnected and reconnected my MAF sensor. I also checked for loose vaccum lines but didn't find any.
So could this be a problem with the Tune and the temperature ?

Thanks,
~Will

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HonduHunter · 03-31-2005, 10:25 PM

it should be because the fuel cant run the AFR you want it to run. the injectors are only able to make a correction of about +-5%. so when they try to tun your AFR and cant do it for whatever reason (leak etc...) then the CEL comes on.

oh and search for a thread about that CEL. lots of good info there.

03-31-2005, 06:53 PM	#1
LEGGT Scooby Newbie Member#: 81770 Join Date: Feb 2005 Location: Orange County, CA Vehicle: 2005 Legacy GT Ltd Obsidian Black	P0171 CEL - Due to tuning? Hi, Today I drove out to lunch, stopped to get some gas and my CEL came on. I checked it at Autozone and it is a P0171 code. I don't have a CAI, just the stock airbox. Do you think the error could be attributed to my dyno-tune/reflash last Friday? It is much warmer today and the Santa Anas are blowing. So I don't know if the outside temp or the wind conditions have anything to do with it. I disconnected and reconnected my MAF sensor. I also checked for loose vaccum lines but didn't find any. So could this be a problem with the Tune and the temperature ? Thanks, ~Will * Registered users of the site do not see these ads.

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03-31-2005, 10:25 PM	#2
HonduHunter Scooby Guru Member#: 28408 Join Date: Oct 2002 Chapter/Region: TXIC Location: San Antonio, Tx Vehicle: 2002 BugEye WRX PSM	it should be because the fuel cant run the AFR you want it to run. the injectors are only able to make a correction of about +-5%. so when they try to tun your AFR and cant do it for whatever reason (leak etc...) then the CEL comes on. oh and search for a thread about that CEL. lots of good info there.