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#49612 12/14/01 12:11 AM
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My 1996 Contour GL was just in the shop for a new right front wheel bearing. and to see why the eng light was on. well the code that came back was PO171 = system too lean - bank no. 1 what the heck does that mean? and what part is doing it? it cost me $117 for them to tell me this code can anyone help me? thanks in addvance confused confused confused

#49613 12/14/01 12:13 AM
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I went to auto zone and they pulled the code for free.


Nick F.
01 Focus ZX3 MTX
borla, eibach pro kit and dampers, dual guage pod (a/f and volt), jvc kd-sh99

96 Contour GL atx-zetec
Yes its a zetec, we were here before vtec, so we are not copying!
#49614 12/14/01 12:15 AM
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1) O2 sensor (maybe) 2)intake manifold air leak (possible) 3)Injector probs(doubt it)


V6 MTX
'Don't p**s up my back then tell me it's raining!!!"
'Its only nuts & bolts!'
'If I build it,fix it,upgrade it or modify it...MAYBE they will come....!
Haines Motor Sports Inc,
Dealer for 'Quaife America' & 'Autotech Sport Tuning'
SOLE USA Dealer for the American Axle 'AUSSIE BAR'...
Get a Turbo for you Zetec from HMS Inc...by 'The Demon' ...www.DemonDynamics.co.uk
..don't talk about it DO IT !!!
#49615 12/14/01 12:33 AM
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Fazzman i have the code it is PO171 system too lean - bank no. 1 that's the code
so what would cause that code to come up and how do i reset the computer?

#49616 12/14/01 12:37 AM
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Deaf !


V6 MTX
'Don't p**s up my back then tell me it's raining!!!"
'Its only nuts & bolts!'
'If I build it,fix it,upgrade it or modify it...MAYBE they will come....!
Haines Motor Sports Inc,
Dealer for 'Quaife America' & 'Autotech Sport Tuning'
SOLE USA Dealer for the American Axle 'AUSSIE BAR'...
Get a Turbo for you Zetec from HMS Inc...by 'The Demon' ...www.DemonDynamics.co.uk
..don't talk about it DO IT !!!
#49617 12/14/01 12:47 AM
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no just want a stright answer and that's all this has been going on for a while and just need a stright answer and how do i rest the computer?

#49618 12/14/01 12:51 AM
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with obd-2 u need to use a scan tool 96 and newer its nice to be able to just disconect the battery or pull the fuses i think ato zone may do it for free but im not to sure?.

eric


_Eric_
95' Performance White Contour Gl Zetec ATX
-A beautiful girlfriend next to me...what other mod is important?
#49619 12/14/01 11:29 PM
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when my car gave a code 172, system too lean, on bank 1. I changed the O2 sensor and it fixed that problem. If you can providethe codes to autozone, they can just look it up on their system and tell you the definition.
Good Luck.

RL

#49620 12/15/01 02:42 AM
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Start with changing your fuel filter!


An ounce of prevention provides a pound of cure!
#49621 12/15/01 04:15 AM
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PCM reset:

Pull negative battery terminal. Wait a minute. Replace. Reset radio and clock.

-OR-

Look in owner's manual under fuses. You can pull the two in the fusebox in the engine bay for the PCM (one is RAM and one is power). I forget the numbers off hand. No need to reset clock and radio with this method.

As already stated, the two first things to do would be to change your fuel filter (every 30k miles, most people forget about doing this, $15 and about 30 minutes time DIY) and the upstream O2 sensor for bank 1 (side closest to driver/firewall and closest to engine and a real PIA to get to on Duratech, closest one to engine on Zetec, about $60 for sensor).


1998 Silver Frost SVT Contour born on...8/28/01[/i]
American Iron Shootout Radial Tire 2 Class Champion, Cecil County Dragway April 20, 2002
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