Question about 1991 Ford Ranger Supercab

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Ford 250 trouble code

What part to replace or test po171 po174

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LEAN CODES, CHECK FOR A VACUUM LEAK AT THE INTAKE MANIFOLD GASKETS, USE A CAN OF CARB SPRAY, WHEN U HIT A LEAK THE ENG WILL CHANGE TONE AND RPM.

Posted on Jun 24, 2009

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What parts do i need to replace for OBD2 Code PO171 and PO174


You have to component test to find a problem

Only failed parts get replaced

Codes have nothing to do with parts

You can have codes & not need parts

Codes only indicate an out of range condition

You have to find out why

Aug 17, 2014 | 1999 Ford Ranger SuperCab

1 Answer

Po171 po174 code


Lean bank 1 and bank 2 , and throttle actuator system fault. Check reason for lean codes 1st, vacuum leak(s), air inlet boot and hoses, or low fuel pressure / clogged filter. Repair as needed then clear codes and recheck .

Jan 09, 2014 | Cars & Trucks

1 Answer

2003 Ford Expedition check engine codes PO171 & PO174


You should be replacing all upstream oxygen sensors,
the ones at the inlet or pipe before the converter,on all
your vehicles at 100,000 miles

Go to Rock Auto.Com & buy two & install yourself

NTK 22060 $26.79 ea

Feb 18, 2013 | 2003 Ford Expedition

1 Answer

Generic code PO171 system 2 lean bank 1 generic


This can be caused by a faulty mass air flow sensor

Jul 06, 2010 | 1999 Ford Taurus

2 Answers

Code po171 and po174. fuel bank 1 & 2 lean. what can i do about it


From Twitter by @carpartslocator.

@car_problems oxegen sensor oar the airflowmeter.but i do not know what kind of car you have i am gessing ford....??

Good luck.

Jul 19, 2009 | 2001 Ford Explorer Sport

1 Answer

Code po171 7 po174


your computer is reporting bank 1 and 2 too lean, usually caused by the mass air flow (MAF) sensor, you can usually clean this sensor and reset the light. Clean it with electric cleaner or brake cleaner, make sure it is dry before reinstalling, also take care not to damage it. Hope this helps, let me know

Jun 09, 2009 | 1997 Ford Thunderbird LX

1 Answer

1996 ranger 4.0 codes po171 and po174 come up on the screen


Check for vacuum leaks, especially the intake manifold gaskets. If those are o.k., clean the Mass air flow sensor.

Apr 12, 2009 | 1996 Ford Ranger SuperCab

1 Answer

1995 Windstar OBD II showing codes PO340, PO171, and PO174


Hello;
With those codes, the first place I would check is the fuel pressure. Also check the fuel filter and replace it if you haven't already. Then clear codes and recheck. Even if your fuel pressure is with in range it still may not push enough fuel to operate your vehicle.

Jan 15, 2009 | 1995 Ford Windstar

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