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Joined: Jul 2002
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I have these two engine codes on and can't figure out what is wrong. I took it to Autozone and had them use their diagnostic tool to tell me that both engine banks are running lean. Is this something with the O2 sensors or something else? Any help would be great.
'97 Contour gl V6 ATX
sho shop CAI, DMD, rebuilt intake, metal waterpump
Ford 9mm Racing Wires
TH fix
Wish I had a third pedal
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Joined: Nov 2003
Posts: 11
New CEG\'er
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New CEG\'er
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I also have a 97 Contour V6 - I just went through what I suspect might be your problem. When first realizing I had those two codes, I got cheap & pulled the battey cable off, to clear them. This worked for approx. a week, and then I got a third code P0420 - I ended up having a bad Cat. converter. The dealership fortunately covered it under the 80,000 mile emissions warranty. Immediately after the Cat was replaced, the same two codes came back P0174, P0171. The dealer informed me that I had an upper & lower intake leak. I ended up replacing both sets of intake gaskets myself, and the car is running fine. The procedures for doing this can be found in the How-To's. Hope this helps.
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Joined: Dec 2002
Posts: 1,049
Hard-core CEG\'er
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Hard-core CEG\'er
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i had i thappen to me also but mine was the codes for running rich in each bank. i unhooked the battery and the cel hasnt come back on for like 2 weeks. i guess it was something that caused it to go rich for a little while at start up and it picked it up and threw a code.
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Joined: May 2000
Posts: 1,359
Webmaster
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Webmaster
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Originally posted by jdtalon2003:
I have these two engine codes on and can't figure out what is wrong. I took it to Autozone and had them use their diagnostic tool to tell me that both engine banks are running lean. Is this something with the O2 sensors or something else? Any help would be great.
If both codes are tripped at the same time, it could indicate a vacuum leak in the induction path somewhere.
-Lance
Lance Kinley
CEG Webmaster
95 SE, "Cassandra"
10 years!
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Joined: Sep 2000
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Hard-core CEG'er
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Originally posted by Lance Kinley:
If both codes are tripped at the same time, it could indicate a vacuum leak in the induction path somewhere.
Very sound advice.
Look for a vacuum leak.
Starting fluid is a good way to help find it.
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
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Joined: Aug 2001
Posts: 4,639
Hard-core CEG'er
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my moms explorer had those. i pulled the intake to clean it but it wasnt dirty. i cleared the codes and a few weeks later they came back. finally my dad took it to our mechanic. needed a new lower intake manifold gasket. $20 part. plenty of labor cost.
Hugo AIM:omegazodiac
95 gl & 99 contour svt #1750/2760
my profile pics stuff for sale
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Joined: Jul 2002
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I just completely rebuilt the intake this past summer because of the same problem, but the CEL came back soon after that. I just got a new y-pipe and want to keep the new convertor from burning up so I am trying to figure out the problem. I used a torque wrench on all the gasketed surfaces so I'm not sure if that is it or not. I'm stumped. Any suggestions on what to try first. Thanks.
'97 Contour gl V6 ATX
sho shop CAI, DMD, rebuilt intake, metal waterpump
Ford 9mm Racing Wires
TH fix
Wish I had a third pedal
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Joined: Oct 2002
Posts: 2,408
Hard-core CEG'er
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"Those who cannot remember the past are condemned to repeat it" -George Santayana
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Posts: 449
CEG\'er
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Don't overlook the PCV area. Make sure the valve is working, then put o-clamps around the tubes to ensure there's no un-metered air getting in. Some new tubing won't hurt either.
98.5 SVT now gone ... new wheels = 2005 330i
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