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Po174 generic system lean bank 1 2 - 2009 Infiniti G37

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What do the following codes mean? PO171,PO174 and PO430. And what is best solution to eliminate them? Is it something I can handle or should I carry it to my local mechanics?


PO171 Fuel System Lean Bank 1
PO174 Fuel System Lean Bank 2
PO430 Catalyst System Low Bank 2
A new fuel filter would be a good start.

Feb 07, 2015 | Cars & Trucks

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

Check engine light is on and when tested shows codes PO174 and PO171


The P0171 means System too Lean (Bank 1) and P0174 means System too Lean (Bank 2).
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FGTech Galletto 2-Master

Nov 08, 2012 | 2004 Suzuki Verona

1 Answer

Error codes PO171, PO174 on 6.0 2004 silverado, what are they?


P0171 means: System too lean (Bank 1) P0174 means: System too lean (Bank 2). Sounds like your injectors are not getting enough fuel.

Nov 16, 2010 | Chevrolet Silverado 2500HD Cars & Trucks

1 Answer

Check engine light is on codes are po171 system too lean (bank 1) po174 system too lean (bank 2) so what can i do


Look for vacuum leaks,that are causing the O2 Sensors to go lean, and set codes on both banks

Nov 11, 2010 | 1997 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

3 Answers

2003 Ford Ranger 4x4 extended cab- diagnostics checked and got these codes- P0171, P0174, P0300, P0316. Can you tell me what they mean?


P0171------ system too lean bank#1
Po174------ system too lean bank#2
For these 2 codes, try cleaning the maf sensor (mass air flow), that is mounted in the big black hose that goes from the air filter housing to the throttle plate, if it is dirty, that will cause those 02 sensors to send a signal to the computor to lean the air fuel mixture. If cleaning it doesn't work, the sensors will probably need changing.
P0300---- Random/multiple cylinder misfire
P0316---- Cylinder misfire at start up---- first 100 revolutions.
On those 2 codes, you have to do some testing to find out why there is a misfire.
Possible causes:
dirty/malfunctioning injectors
weak coil pack
fowling spark plugs/wires
Low fuel pressure

May 11, 2010 | 2003 Ford Ranger Regular Cab

1 Answer

97 Mercury cougar xr7 v6. po443, po430, po171, po174,


Sounds like you have low fuel supply or a leak in intake system causing lean codes, check fuek pressure and volume first. Cat converter effeciancy could be caused by the lean codes, purge system sounds like solenoid failure, check for high resistance accross purge vent solenoid.

Mar 08, 2010 | 1997 Mercury Cougar XR7

1 Answer

What do these trouble codes mean p0171 and p0174


po171 is system too lean,bank 1,po174,is system too lean,bank 2,It sounds like a fuel pressure problem.

Jan 05, 2010 | 2000 Chevrolet Blazer

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