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Guest
Anonymous Poster
james.colclasure@usmc.mil

Oct 23, 2008, 5:10 AM

Post #1 of 3 (1222 views)

Need immediate help!	Sign In

I drive a 1997 Ford Contour.
It is a little 4 banger engine with 140,000 miles on it.
Recently it has been failing its state inspection. The code that it provides is:
P0171 - Bank 1 System too lean.

I've been given a diagnosis of everything from O2 sensor to a vacuum seal leak.

If ANYONE knows what could be causing the problem and can give me a sure-fire solution, I would greatly appreciate it. I am tired of pouring money into this vehicle for it to NOT fix the problem.

dmac0923
Enthusiast

Oct 23, 2008, 5:35 AM

Post #2 of 3 (1212 views)

Re: Need immediate help!	Sign In

lean condition in bank 1 means the O2 sensor in bank 1 is detecting a lean condition (too much oxygen)

check/clean your MAF sensor.
check for any vaccuum leaks.
__________________________________________________
2015 Jeep Grand Cherokee
2002 Ford Ranger
2004 Toyota Corolla
1969 Ford Mustang Mach 1

way2old
Veteran / Moderator
way2old profile image

Oct 23, 2008, 6:02 AM

Post #3 of 3 (1210 views)

Re: Need immediate help!	Sign In

It could be caused b any vacuum leak on the engine laso. Make sure all the hoses and gaskets are in good shape and do not leak.

Being way2old is why I need help from younger minds

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