Code p0171 and p0174 - 2002 GMC Sierra 1500

Question edited for clarity. It is P-Zero 0, not P-oh O.
Please always include 'year make model' first 3 words, or it it is difficult to answer and some vehicles are slightly different or more precise and will show known issues.

P0174 - OBD-II Trouble Code Fuel System Too Lean (Bank 2)

https://repairpal.com > obd-ii-code-p0174
When a vehicle has the fault code P0174, it means that computer can no longer automatically adjust the mixture between air and fuel. Code P0174 applies to V ...

P0174 OBD-II Trouble Code: System Too Lean (Bank 2)

https://www.yourmechanic.com > Articles
Code P0174 indicates that there is a lean condition detected by the Engine Control Module (ECM). A lean condition will be created if there is too much air, and ...

P0151 Code - What Does It Mean & How To Fix It - OBD2PROS

https://obd2pros.com > dtc-codes > p0151
A P0151 code is caused by an ECM (Engine Control Module) receiving a signal indicating the O2 sensor for bank 2 sensor 1 has failed to increase the voltage ...

Code P0171 - System Too Lean: Symptoms, causes, common ...

https://www.samarins.com > diagnose > p0171
Jul 10, 2021 - The OBDII trouble code P0171 - System Too Lean (Bank 1) means that the engine air-fuel mixture is too lean, or there is too much air and too ...

P0171 & P0174 Lean condition . A number of thing's could cause this , weak fuel pump , plugged fuel filter , vacuum leaks , dirty fuel injectors . Taking your vehicle to a qualified repair shop would be your best bet .
System Too Lean P0171 P0174 Vacuum Leak Quick Test Ford 5 4
Lean Condition Diagnosis on Ford p0171 P0174

Watch some more video's

P0300 - random misfire , P0171 & P0174 lean code's . All of this means you could have a bad vacuum leak ,low fuel pressure ,clogged fuel filter , Mass air flow sensor problem .
Ford 150 P0171 P0174 Trouble Codes vacuum leak water test
Low fuel pressure causing P0171 and P0174 trouble code

Stuck with these codes P0174 and P0171..need help - Hyundai Forums ...

www.hyundai-forums.com/.../237193-stuck-these-codes-p0174-p0171-n...

Feb 12, 2014 - 10 posts - ‎6 authors
I've been getting these codes for awhile now which are p0174 "ECM has detected ... 06 Sonata LX 3.3L V6 ... the fact that your FE has gone down could indicate something else as .... 2014 Santa Fe Sport 2.0T AWD w/ Tech Package ... Join Date: Jul 2007 ...More on PowerTorque Tools - Hex Bits Set - SAE ...Missing: examination

p0171 p0172 p0174 p0175 p2187 p2188 p2189 p2190 - Page 2 - Hyundai ...

www.hyundai-forums.com/.../336641-p0171-p0172-p0174-p0175-p21...

Dec 25, 2014 - 10 posts - ‎3 authors
today one of my colleague who have same car sonata 2007 but with 4 cylinder.for checking ... Drives hyundai accent 2005(sold) Drives Hyundai Sonata 2006 v6 3.3L ...Due to it throwing codes for both rich and lean and after finding a thread searching those.... More on UltraSteel - Magnetic Nut Driver Set.Missing: examination

santa fe won't start, what is most likely wrong? - CarGurus

Here's a link on your codes. P0171 and P0174 OBD II Trouble Codes

http://www.obd-codes.com/p0171

http://www.obd-codes.com/p0174

Check the above articles for help with these OBDII codes.

Smoke testing for codes P0171 P0174 - YouTube

? 5:48
www.youtube.com/watch?v=kZsqEfP-5zM
Jan 18, 2011 - Uploaded by realfixesrealfast Smoke testing for codes P0171 P0174 .... I have a 1995 ford mustang gt 5.0 and it keeps having a Fault code 176 pop up. ....Ford Explorer P0174 code intake air leak check engine light by froggy - Duration: 16:11. by froggy ...

Determining exactly what of the thousands of parts on a modern car is broken is as difficult as doing the repairs many times. IN this video you'll learn how to diagnose and fix error codes P0171 and P0174 on a 2001 Ford Escape, which indicate vacuum problems.http://www.lightdeal.co.uk/

check for vacuum leaks or a faulty mass air flow sensor. all the codes have to do with engine too lean(too much air).

code P0171 P0174?? sorry these are not nissan codes but the code readers own codes so return to where the reading was done and ask them