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uspspro · 10-17-2013, 03:41 PM

Shiv,

Why is the header causing the lean code? P0171 is based on the fuel trim being considerably out of spec on the LEAN side.

Please explain... Isn't it usually best to try to avoid disabling system checks unless absolutely necessary?

10-17-2013, 03:41 PM	#344
uspspro Senior Member Join Date: Mar 2012 Drives: DGM BRZ, MR-S 3.5L V6 swap (sold) Location: Bay Area, CA Posts: 602 Thanks: 28 Thanked 188 Times in 121 Posts Mentioned: 1 Post(s)	Shiv, Why is the header causing the lean code? P0171 is based on the fuel trim being considerably out of spec on the LEAN side. Please explain... Isn't it usually best to try to avoid disabling system checks unless absolutely necessary?