P0171 Code
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Tuned
Joined: May 2015
Posts: 314
Likes: 9
From: SE WI
P0171 Code
I am now in the process of learning everything I don't want to know about the P0171 Code - Lean/Bank 1.
Since is is winter time in WI and too cold to go outdoors and look/work under the hood I thought I would ask here in hopes someone knows:
The truck is -
2002
F250 XLT Extended Cab
V10, 6.8 L
140K
When I changed the plugs last summer I found it easier to access Plug #5 (Passenger Side, all the way in the back) by removing a bracket high on the firewall above/over the #5 spark plug. One of the things attached to this bracket was a Schrader Valve.
My Questions Are => Is this the valve used to check fuel pressure? If not/ what is it?
Would a clogged fuel filter cause a lean condition on only one bank of the engine? Logically, it would seem the flow of fuel restricted by a clogged fuel filter would effect both banks of the engine equally?
Thanks for your input!
Since is is winter time in WI and too cold to go outdoors and look/work under the hood I thought I would ask here in hopes someone knows:
The truck is -
2002
F250 XLT Extended Cab
V10, 6.8 L
140K
When I changed the plugs last summer I found it easier to access Plug #5 (Passenger Side, all the way in the back) by removing a bracket high on the firewall above/over the #5 spark plug. One of the things attached to this bracket was a Schrader Valve.
My Questions Are => Is this the valve used to check fuel pressure? If not/ what is it?
Would a clogged fuel filter cause a lean condition on only one bank of the engine? Logically, it would seem the flow of fuel restricted by a clogged fuel filter would effect both banks of the engine equally?
Thanks for your input!
Tuned
Joined: Jan 2004
Posts: 321
Likes: 2
From: Las Vegas, NV
I was getting that code on my '05 F350 V10. After a close look under the hood I found a disconnected vacuum line on the temperature control valve for the auto climate control. This of course after I swapped a bunch of other vacuum lines with the ones on my V10 motorhome.
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