Question about 1996 Ford Thunderbird LX

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My check eng lite says on my putter said its a po171 and po174 runs lean help

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Vacuum leaks,somewhere,causing your
O2 Sensors to report a lean condition on
both banks

Check all your vacuum hoses

Posted on Mar 28, 2011

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Posted on Jan 02, 2017

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CHECK ENG LIGHT ON P0171,P0174,P1000,O2195.P2197 WHAT OR THESE CODES AND HOW CAN I FIX.


PO171 & PO174 are codes for fuel too lean. So is the clattering valves when you step on it. Sounds like you got some bad gas. Try filling up with a high octane gas and add a gas treatment for Ethanol which will help get some water out of the system. Good Luck

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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

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1999 chevrolet 1500 with a 5.3 engine engine light on had check had a code in it po171 and po174 sey burning to lean on bank 1 and bank 2 what should i check for did pass inspection


Running lean on both banks? Check intake tubing/hoses for loose clamps and cracks/tears aft of the mass airflow sensor. Could also be a fairly large vacuum leak.

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2 Answers

Help on finding out wind star coads PP0171-/-P074-/-P0401


first PO171 o2 bank 1 s1 lean PO174 o2 bank2 lean
PO401 cyl 1 misfire
when an engine misfires the oxygen sensor will read the oxygen from that cyl sensor doesnt read fuel so every misfire is a air pump to diagnose we have to fix misfire first check the coil wires and plugs for cyl 1 use spray bottle with water run engine hot at idle spray wires with water if enging runs rough shakes or stalls then replace the wires dont spray with to much water if the wires are real bad you may not be able to restart engine

try this first once fix misfire clear codes and drive it

plz comment vote reply if you need more help

Jan 17, 2011 | Ford Windstar Cars & Trucks

1 Answer

Generic code PO171 system 2 lean bank 1 generic


This can be caused by a faulty mass air flow sensor

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1 Answer

Ford 250 trouble code


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.

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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

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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