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DTC PO171 and PO174 om '97 X

arby dar

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January 24, 2006
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City, State
Winnipeg
Year, Model & Trim Level
98 XLT
My check engine light was on so I retrieved the DTC and there were 2. 1-PO171 and PO174.
PO171 indicates System to lean (bank 1) and PO174 indicated System to lean (bank 2).

Any idea where to start looking for a fix?

Thx
 


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ma96782

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'94 XLT, 4dr
Search.....

Aloha, Mark

Since you're new........Grant617 once posted:

I was having the P0174 and P0171 codes recently (usually one would be pending). Nonetheless, at one point my 2000 Mountaineer w/99K would just die while driving if I didn't hold the accelerator pedal down a bit to idle it. I unplugged the MAF sensor and suddenly I no longer had to hold down the accelerator pedal. I swapped the MAF sensor at a cost of about $131 wholesale. (Later a Master Ford Mechanic told me the MAF sensor rarely goes bad.)

Sure enough the codes came back about 2 weeks later. I thought it was the o-rings and needed the 00M12 kit that is talked about so much. But none of my neighborhood mechanics were convinced and wanted to tackle the job. They dismantled the MAF Sensor and chocked it out and the truck died (so they thought no leak). WRONG

Just brought it in to the dealer for a diagnosis @$85 bucks and they confirmed it was the o-ring problem. The rattling you are hearing is the cam shaft tensioner that comes with the kit. The reason it only affects a cold engine is that when the engine is hot the plastic rings expand and stop the leak (I think I remembered that right). Stop guessing and get this done if you haven't already that is if you have the V-6 SOHC engine (not sure if other engines was affected). The kit was about $35 wholesale and $45 retail. The installation is what will kill you at a dealer (I think they bill it at 4 hours). Nonetheless, if you are mechanically inclined I do have a hardcopy of the instructions and can fax them to you.

My truck sounds much better now and runs great. Now I have to figure out how to get my front end to be like new again. I know I need some sway bar bushings....the saga continues.
 












arby dar

New Member
Joined
January 24, 2006
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City, State
Winnipeg
Year, Model & Trim Level
98 XLT
sorry I was in a rush, should have also stated that it is a pushrod v-6 and the only other problem is a high idle upon startup when it is cold. I cleaned the MAF sensor about 3 months ago so it should be good. Possible the IAC? any idea on replacement $ for that? Thx for the replys

:thumbsup:
 




ma96782

Explorer Addict
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January 21, 2006
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'94 XLT, 4dr




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