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alibies
Veteran CEG'er

Reged: 12/09/02
Posts: 647
p-0171 threwn after replacing o2 sensor
#1302115 - 08/17/06 03:49 AM

i replaced the sensor and soon after i get the same code... any ideas?

--------------------
1996 ford contour sport

Originally posted by Cookie Monster:
Sometimes I just start slowing down and glare in the rearview and say "yeah I could go for an SVT rear". Jackasses.








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Tony2005
Addicted CEG'er

Reged: 06/19/05
Posts: 5345
Loc: Virginia, USA
Re: p-0171 threwn after replacing o2 sensor new
#1302116 (Re: alibies) 08/17/06 03:52 AM

What engine and how many miles? Which sensor did you replace and why did you replace the sensor in the first place?

--------------------
"Always do the cheap and easy ones first."

1996 V6 ATX 96K miles


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alibies
Veteran CEG'er

Reged: 12/09/02
Posts: 647
Re: p-0171 threwn after replacing o2 sensor new
#1302133 (Re: Tony2005) 08/17/06 04:08 AM

zetec Mtx, threw a p0171 i posted it and was told to replace the o2 sensor... so i did

i put a mil eliminator on the 2nd o2 sensor but i dont know why it would cause the other one to throw a code.

129500 miles

--------------------
1996 ford contour sport

Originally posted by Cookie Monster:
Sometimes I just start slowing down and glare in the rearview and say "yeah I could go for an SVT rear". Jackasses.








Post Extras: Print Post Remind Me! Notify Moderator
Tony2005
Addicted CEG'er

Reged: 06/19/05
Posts: 5345
Loc: Virginia, USA
Re: p-0171 threwn after replacing o2 sensor new
#1302140 (Re: alibies) 08/17/06 04:12 AM

Did you replace the Upper sensor for the P0171 code? If you did, it could be a vacuum leak. Did you also check the other items previously suggested?
Originally posted by Tony2005:
Also check for vacuum leaks at gaskets, hoses and hose clampes.

And clean the MAF sensor
http://www.contour.org/mods/mods.php?s=howto&displayid=36
and
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=zetecmaint&Number=989728&page=&view=&sb=5&o=&fpart=1&vc=1
and
http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1b/cb/25/0900823d801bcb25.jsp




Edit. From TSB,
P0171 - System Too Lean (Bank 1) The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The code is set when the adaptive fuel tables reach a rich calibrated limit.

Fuel System:
· Contaminated fuel injectors
· Low fuel pressure or running out of fuel (fuel pump, filter, fuel supply line restrictions)
· Vapor recovery system (VMV)

Induction System:
· MAF contamination
· Air leaks between the MAF and throttle body
· Vacuum leaks
· PCV system concern
· Improperly seated engine oil dipstick

EGR System:
· Leaking gasket
· Stuck EGR valve
· Leaking diaphragm or EVR

Base Engine:
· Exhaust leaks before or near the HO2S
· Secondary air concern

Powertrain Control System:
· PCM concern

--------------------
"Always do the cheap and easy ones first."

1996 V6 ATX 96K miles


Edited by Tony2005 (08/17/06 04:16 AM)

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alibies
Veteran CEG'er

Reged: 12/09/02
Posts: 647
Re: p-0171 threwn after replacing o2 sensor new
#1302149 (Re: Tony2005) 08/17/06 04:20 AM

::goes out to car::

--------------------
1996 ford contour sport

Originally posted by Cookie Monster:
Sometimes I just start slowing down and glare in the rearview and say "yeah I could go for an SVT rear". Jackasses.








Post Extras: Print Post Remind Me! Notify Moderator
alibies
Veteran CEG'er

Reged: 12/09/02
Posts: 647
Re: p-0171 threwn after replacing o2 sensor new
#1302562 (Re: alibies) 08/17/06 08:38 PM

WOW! i got some CRC maf sensor cleaner and took apart my maf (it had some brown stuff covering it... sprayed it clean i can feel a major gain on power! wooo hooo

--------------------
1996 ford contour sport

Originally posted by Cookie Monster:
Sometimes I just start slowing down and glare in the rearview and say "yeah I could go for an SVT rear". Jackasses.








Post Extras: Print Post Remind Me! Notify Moderator
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