MustangWorks.com : Ford Forums - View Single Post

Nicodemus · 08-15-2002, 12:12 AM

I just took my v6 to emissions and I failed. The print out they gave me reported a diagnostic trouble code: P0171 And I checked my manual on that code and it said: "System too lean (Bank1)". I had just recently installed a MAC cold air intake, is that affecting the car; if so, how can it be fixed/adjusted?

Also, on mil status it reported "mil command on: fail" what does this mean?

And last how do i run a test to find out why my check engine light is activated?

Thanks

08-15-2002, 12:12 AM	#1
Nicodemus Registered Member Join Date: Jul 2002 Location: Chandler, AZ Posts: 10	Failed emissions test I just took my v6 to emissions and I failed. The print out they gave me reported a diagnostic trouble code: P0171 And I checked my manual on that code and it said: "System too lean (Bank1)". I had just recently installed a MAC cold air intake, is that affecting the car; if so, how can it be fixed/adjusted? Also, on mil status it reported "mil command on: fail" what does this mean? And last how do i run a test to find out why my check engine light is activated? Thanks