Failed emissions test

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

SinisterSN95 · 08-15-2002, 12:38 AM

any mods to the exhaust?

what other things have you done to it performance wise???

Nicodemus · 08-15-2002, 08:43 AM

It's mainly stock '96 v6 single exhaust. The only changes are new Bosch Platinum 4 spark plugs and MAC cold air intake

mustang2000 · 08-18-2002, 11:30 PM

i aint no pro about all this or anything but i know that ford puts catalytic converters on the cars to control the emissions now if that has gone bad u might have to replace it or if u bought it used the other guy could have changed the exhaust and they messed with the catalyctic converter that could cause u to fail your emissions but this is just my opinion i dunno for sure though

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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Failed emissions - Help!	Mustang_289	Windsor Power	3	03-23-2002 04:27 PM
Just failed Emissions test!	Chevyguy	Windsor Power	3	03-13-2002 05:33 PM
Failed Emissions test with carb'd '85 - what to do?	autoX	Windsor Power	10	02-23-2002 05:58 PM
Failed New Jersey Emissions	RMARIANI	Windsor Power	8	05-04-2001 07:39 PM
Failed emissions test in IL	Rogue Stang	Windsor Power	1	03-02-2001 02:34 AM

08-15-2002, 12:38 AM	#2
SinisterSN95 Registered Member Join Date: May 2002 Location: Chicago, Illinois Posts: 106	any mods to the exhaust? what other things have you done to it performance wise???

08-15-2002, 08:43 AM	#3
Nicodemus Registered Member Join Date: Jul 2002 Location: Chandler, AZ Posts: 10	It's mainly stock '96 v6 single exhaust. The only changes are new Bosch Platinum 4 spark plugs and MAC cold air intake

08-18-2002, 11:30 PM	#4
mustang2000 Registered Member Join Date: Mar 2002 Location: loveland Posts: 25	i aint no pro about all this or anything but i know that ford puts catalytic converters on the cars to control the emissions now if that has gone bad u might have to replace it or if u bought it used the other guy could have changed the exhaust and they messed with the catalyctic converter that could cause u to fail your emissions but this is just my opinion i dunno for sure though