Po174 chevy silverado

So, you are faced with diagnosing a stored a code P050D. It means that the powertrain control module (PCM) has detected a rough engine idle during cold start...

Dec 3, 2020 ... Check Engine Light? System Too Lean - Code P0171 or P0174 on Your Car or Truck. 1A Auto: Repair Tips & Secrets Only Mechanics Know•1.1M views.P0174 code on a 2000 Silverado. The code indicates that the cylinder bank 2 (Passenger side) is running lean, as reported by the upstream O2 sensor on that side on the exhaust pipe. It could really be running lean, or it could be …How to fixes a Chevy Silverado 5.3L engine with a P0171 Code System Too Lean (Bank 1)Read here for more information: https://www.backyardmechanic.org/fixes-f...May 2, 2018 · Scanned it and got P0171 and P0174, bank 1 and bank 2 Lean Codes. I'm not sure exactly what some of the 'normal' readings are so I will list a few of the Freeze Frame numbers and see what you all might suggest. Both Long Term Fuel Trims are way off and Short terms are normal. Fuel Press seems a bit low possibly and not sure of 'normal' MAF or ... hello my viewers here is how i fixed a 2014 silverado with a P015B code, also the tools that i used i hope this helps you out please subscribe hit like if it...Oct 15, 2023 · Oct 15, 2023. #1. Chevy Silverado 2020 5.3 with 34,000 miles throwing P0171 & P0174 codes just showed up. BONE stock. Only thing to report is that I just had a one day trip with 300 or so miles and filled it up with gas just before I got home . I didn't notice if it came on yesterday but noticed it today. Otherwise all normal. Mar 3, 2019 ... ... when going to start the truck. Immediately after, the engine revved all the way up in park (as if I was pressing on the gas pedal). I found a...The Engine Control Module measures the amount of oxygen in the exhaust system via the oxygen sensors and makes adjustments by adding more or less fuel to the mixture. When the adjustments become too large to maintain the proper mixture, the fault codes P0171 and P0174 are logged. They are logged together since, in V8 and V6 (and …

Apr 6, 2022 · Common Reason: Code P0174 is often related to a vacuum leak. Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. When there are more than 14.7 parts air to 1 part fuel in the air-fuel mixture, a lean condition exists and code P0174 is triggered. 2008 Chevy Silverado P1175 was created by Cirp73. 2008 Chevy Silverado 5.3L 125k miles. So I have multiple issues I’m trying to solve. The first issues I have is the check engine light is on and my scanner shows a P1175 code. Now, it also had a P0174 before I cleared the codes after cleaning the Mass Air Flow Sensor and …The most common cause of the P0171 code – and the P0170 and P0173-P0174 codes – is unmetered air entering the combustion system. Most of the time, this happens due to faulty or dirty mass ...P0154 is a relatively common trouble code. It’s generic, which means that it has the same meaning for any vehicle with OBDII ( Chevy Silverado or not). It means that the PCM/ECM is not detecting any activity from the sensor. There can be many reasons for this code to throw. These include a bad o2 sensor, blown heated element fuse, and …This issue only occurs whenever the temp dips below around 40 degrees F. Getting engine codes P0171 & P0174. ... A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! ...Do you have a 2007-2011 Chevrolet Express, Silverado, GMC Sierra or Savana with the 6.0L engine and are experiencing an illuminated check engine light and st...It's a snap on verdict. Chevy Mechanic: GM Bob. There should be a purge/seal test. If so run the pruge up to 30% watch the fuel tank pressure sensor vacuum. seal the system it should hold. Than command the evap vent solenoid on. The pressure should drop quickly. If not may have a plugged canister.

Jan 4, 2013 · P0174 code on a 2000 Silverado. The code indicates that the cylinder bank 2 (Passenger side) is running lean, as reported by the upstream O2 sensor on that side on the exhaust pipe. It could really be running lean, or it could be an O2 sensor going out and reporting false values. Chevrolet Silverado 1500: I have lean codes on a 2001 chevy. I have lean codes on a 2001 chevy silverado motor is the 4.8 codes are p0174 and p0171. I've changed the valve by tank the valve on the top … read more. ZZDaryl. Lead Auto Tech.Chevy Mechanic: ironmike. the gaskets are the most common. The O2 sensors will have a high positive fuel trim (vacuum leak) and they will shoot up from low mV to maybe 800 mV (when spraying intake) and the fuel pump is a possibilty. Fuel pressure should be 55-62 psi. Edited by ironmike on 5/22/2010 at 3:33 PM EST.Meet the Experts. 2018 Silverado 6.0 2500hd p0171 p0174 codes. truck has 1250. miles on it. Codes are p0171 and p0174. i did reset but - Answered by a verified Chevy Mechanic.

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Mar 30, 2018 · I have a 2009 GMC Sierra SLT with 5.3 liter vortec. I am getting intermittent P0171 and P0174 (O2 sensors) codes along with a very intermittent P0107, P0101, and P0300 (misfires on cylder 1 and 7 and random cylinder misfire). I have tested the fuel injectors (switching them around and cleaning them), ran sea foam through the gas tank, through ... The factory stereo installed in the Chevy Colorado only has an AM/FM stereo tuner and a CD player. Many aftermarket stereos, on the other hand, have auxiliary inputs, iPod control ...P0171 Code Chevy Silverado. P0171 is a common trouble code for a Chevy Silverado with an engine that is running lean. This can be caused by a number of different things, but the most common cause is a vacuum leak. Other causes can include dirty fuel injectors, a faulty mass air flow sensor, or a leaking intake manifold gasket. ...Aug 9, 2023 ... Please & Subscribe more video will post 5 times a week. @Auto Repair Procedures ✓ Auto Repair/Concern Assistant Coming Soon.This issue only occurs whenever the temp dips below around 40 degrees F. Getting engine codes P0171 & P0174. ... A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! ...The P0175 code means that more gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0175 is set in along with the P0172 code, it is highly likely that the problem is caused by leaking fuel injectors. If there are no leaking fuel injectors, the next step is to replace the air filter and clean the Mass Air Flow (MAF ...

Mar 10, 2022 ... Chevy silverado, lean code diag with 02 sensors.Code P0174 applies to V engines as they will have two banks, Bank 1 and Bank 2. When the code says that the Fuel System is "too lean," it means that the computer has been adding more and more fuel, which is called Long Term Fuel Trim. Ideally, the Long Term Fuel Trim should be close to 1 to 2 percent. When a code P0174 is set, it means that the ...245 posts · Joined 2014. #1 · Jun 29, 2015. Just got the following codes off my truck when the CEL came on: P0101, P0171, P0174, P0327. I pulled the intake all the way off including the manifold, gave it a good cleaning (including the MAF) and drove it around a bit only to have them come back. I cleared the codes and drove it to an …PO171 PO174 The codes from HELL!!! Finally fixed. Maybe this will help you!Check out My Amazon Auto Accessories Store! Lets make that Weekend job less Painf...Jan 10, 2022 · This 2019 Chevrolet Traverse with a 3.6 liter engine came into the shop with a complaint of a check engine light and stalling problem. The customer states that the vehicle will randomly shut off. The codes in this vehicle were: P0171 - Fuel Trim System Lean Bank 1. P0174 - Fuel Trim System Lean Bank 2. Apr 6, 2022 · Common Reason: Code P0174 is often related to a vacuum leak. Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. When there are more than 14.7 parts air to 1 part fuel in the air-fuel mixture, a lean condition exists and code P0174 is triggered. Aug 21, 2018 · February 13, 2023 by Jason. P0302 in the Chevy Silverado is a common OBD II trouble code. It indicates that your truck’s second cylinder has a misfire. P0302 is a real drivability concern and should be dealt with right away. If it’s bad enough to cause your Silverado’s check engine light to come on, you shouldn’t drive your truck at all. P0101 code in the Chevy Silverado is crucial to maintaining your truck’s performance and ensuring it runs efficiently. This code indicates that there is a problem with your truck’s Mass Air Flow (MAF) sensor, specifically, a Range/Performance issue. The most common cause of P0101 is a bad MAF sensor.Get ratings and reviews for the top 11 gutter guard companies in Chevy Chase, MD. Helping you find the best gutter guard companies for the job. Expert Advice On Improving Your Home...Today we have a 2015 Chevy Silverado 1500 5.3L that keeps setting a check engine light and intermittently doesn't shut off when the key is turned off! The bi...p0101, p0171, p0174. I picked up this 04 silverado 1500 4x4 a few weeks ago. CEL is on and giving me those three codes. I replaced intake manifold gasket and cleaned MAF. Everything looks good and as far as I can tell all hoses between MAF and engine look great. Anyway, I cleared the codes and they popped up about two days later.Aug 20, 2008 ... I have a 1999 chevy truck (http://www.automotiveforums.com/vbulletin/#) with a rebuilt engine 4.3L V6. Engine light coming on for awhile and ...

Jan 22, 2019 ... I have a motor and transmission from a 2006 Chevy Silverado they both are 1500 4x4 would everything fit? 2002 Chevrolet Avalanche 1500 4WD.

Feb 12, 2023 · The P0174 code means that the O2 sensor on bank 2 has recognized a too lean mixture, and the imbalance is too great for the O2 sensor to correct the issue on its own. The O2 sensor can correct a fuel mixture of +-15%. If the needed correction is out of this range, the P0174 code will be stored. So, you are faced with diagnosing a stored a code P050D. It means that the powertrain control module (PCM) has detected a rough engine idle during cold start...Jul 10, 2018 · Oxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Silverado’s engine is running lean. The sensor on or right after the exhaust manifold is typically the sensor that reports the lean condition. If it is malfunctioning, it can cause a false P0171 code. Swap Test. P0101 code in the Chevy Silverado is crucial to maintaining your truck’s performance and ensuring it runs efficiently. This code indicates that there is a problem with your truck’s Mass Air Flow (MAF) sensor, specifically, a Range/Performance issue. The most common cause of P0101 is a bad MAF sensor.May 14, 2018 · P0171, P0174, P0300. Hello everyone, first time on this forum but my trucks got me stumped. Im trying to get my truck to pass emissions, but I've got DTCs and that's an automatic fail where I live. The previous owner sold it because he couldn't get it to pass emissions either, so far I've changed the intake manifold gaskets and MAF sensor, the ... Scan retrieved codes P0171 and P0174. Problem was under reporting MAF sensor due to small piec... This 2015 GMC was brought in due to rough idle and the MIL on. Scan retrieved codes P0171 and P0174.Chevy Mechanic: ironmike. the gaskets are the most common. The O2 sensors will have a high positive fuel trim (vacuum leak) and they will shoot up from low mV to maybe 800 mV (when spraying intake) and the fuel pump is a possibilty. Fuel pressure should be 55-62 psi. Edited by ironmike on 5/22/2010 at 3:33 PM EST.Feb 11, 2012 · code po174 02 silverado 5.3 engine. Answered in 15 minutes by: Chevy Mechanic: conquest.tsi. Hello.....this code is usually stored when engine is cold and is due to a vacuum leak from the intake manifold or sometimes to the intake itself. Fuel trims should be checked when cold to confirm the problem, this is the most common problem. Jul 10, 2018 · Oxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Silverado’s engine is running lean. The sensor on or right after the exhaust manifold is typically the sensor that reports the lean condition. If it is malfunctioning, it can cause a false P0171 code. Swap Test. Oct 21, 2020 · =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈==== How to Fix P0174 =====Engine Code P0174 Saving Repair ...

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Dec 3, 2020 ... Check Engine Light? System Too Lean - Code P0171 or P0174 on Your Car or Truck. 1A Auto: Repair Tips & Secrets Only Mechanics Know•1.1M views.It’s generic, meaning it has the same definition for the Chevy Silverado as any other vehicle. ... You may see P0171 or P0174 with this code if that’s the case. Chevy Silverado P0443 Causes Top Causes. P0443 indicates that there’s an issue with the process that commands the purge valve solenoid. The Silverado’s ECM commands the …Oct 21, 2020 · =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈==== How to Fix P0174 =====Engine Code P0174 Saving Repair ... Most people end up popping a PO174 AND a PO171 code (with a vac leak or dirty MAF being the common problems) or even a O2 sensor code as well, whereas I only have the PO174 and a gaseous smell in the cab on idle. ... Chevy Silverado EV Forum 2K+ members. Home. Forums. Truck Talk. Engine. Vortec 6200 6.2L V8. Home; About Us; …Alternatively, intake and exhaust leaks can also throw off your trims leading to such codes. Did you used to get 15 mpg with E85? 2009 GMC Yukon XL SLT 5.3 K5L - 2012 GMC Sierra SLT 6.2 NHT - 2013 GMC Sierra SLT 6.2 GAT. “Woe unto them that call evil good, and good evil; that put darkness for light, and light for darkness; that put bitter …The Engine Control Module measures the amount of oxygen in the exhaust system via the oxygen sensors and makes adjustments by adding more or less fuel to the mixture. When the adjustments become too large to maintain the proper mixture, the fault codes P0171 and P0174 are logged. They are logged together since, in V8 and V6 (and more rarely in ...Meet the Experts. 2018 Silverado 6.0 2500hd p0171 p0174 codes. truck has 1250. miles on it. Codes are p0171 and p0174. i did reset but - Answered by a verified Chevy Mechanic.January 24, 2023 by Jason. One of the most common trouble codes with the Chevy Silverado is P0171. It indicates that your Chevy Silverado is running lean on the … ….

Jul 10, 2022 · Diagnostic trouble code P0174 means system too lean bank 2. This means the powertrain control module (PCM) has detected lean conditions in bank 2 in the air-fuel ratio (AFR). Lean conditions mean there is too much air or too little fuel. Bank here means the location of the cylinder head in v-type engines. Check out this article, bank 1 and bank ... The P0174 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0174 is set in along with the P0171 code, it is highly likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow (MAF) Sensor.Cw303. P0171 and p0174 are left side and right side lean codes. You either have a vaccum leak or lack of fuel throwing off your mixture settings your maf sensor can have something to do with this but throwing a fuel pressure gauge on when ts running might some some problems. I had the same codes and in turned out my fuel pressure was slightly down.The P0174 code means that the O2 sensor on bank 2 has recognized a too lean mixture, and the imbalance is too great for the O2 sensor to correct the issue on its own. The O2 sensor can correct a fuel mixture of +-15%.Mileage: 101,740 miles MPG: 16 city / 22 hwy Color: Silver Body Style: Pickup Engine: 8 Cyl 5.3 L Transmission: Automatic. Description: Used 2014 Chevrolet Silverado 1500 LT with Four-Wheel Drive, Tinted Windows, Keyless Entry, Alloy Wheels, Full Size Spare Tire, Front Bench Seat, and Locking Tailgate. More.How to Fix P0174 Engine Code in 2 Minutes [2 DIY Methods / Only $8.99] - YouTube. nonda. 91.2K subscribers. Subscribed. 1.3K. 333K views 3 years ago UNITED STATES. …Common Reason: Code P0174 is often related to a vacuum leak. Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. When there are more than 14.7 parts air to 1 part fuel in the air-fuel mixture, a lean condition exists and code P0174 is triggered.Chevy Mechanic: ironmike. the gaskets are the most common. The O2 sensors will have a high positive fuel trim (vacuum leak) and they will shoot up from low mV to maybe 800 mV (when spraying intake) and the fuel pump is a possibilty. Fuel pressure should be 55-62 psi. Edited by ironmike on 5/22/2010 at 3:33 PM EST.Nov 22, 2014 · I have a new body style 2007 GMC sierra vortec max and recently have been getting P0171/P0174 lean conditions in bank 1 and bank 2 and I cant figure it out. SYMPTOMS: Check engine light. Stabilitrak/Traction control off/service randomly comes on, mostly at a stop or lower speeds. Stall/sputter @ idle, especially if started with the remote start ... Po174 chevy silverado, A faulty gas cap is the most common cause of P0442 codes in Chevy Silverados. The gas cap creates a tight seal over the fuel tank, preventing gas vapors from escaping. If the cap is damaged or worn, it can leak, allowing gas vapors to escape and triggering the P0442 code., Jan 14, 2016 · Most people end up popping a PO174 AND a PO171 code (with a vac leak or dirty MAF being the common problems) or even a O2 sensor code as well, whereas I only have the PO174 and a gaseous smell in the cab on idle. The closest I found is this thread where his K&N CAI WAS causing the problem, but he had a different model, and had both lean codes. , Feb 11, 2012 · code po174 02 silverado 5.3 engine. Answered in 15 minutes by: Chevy Mechanic: conquest.tsi. Hello.....this code is usually stored when engine is cold and is due to a vacuum leak from the intake manifold or sometimes to the intake itself. Fuel trims should be checked when cold to confirm the problem, this is the most common problem. , Apr 5, 2019 · A P0174 is a code that says it all. Something is wrong with the exhaust, but until its fixed the car will expunge more fuel. However, what if it was the oxyg... , P0171and P0174 CODES CHEVY VORTEC ENGINE.Ron WilliamsMobile Fix Automotive26793 Madison Ave Suite 100Murrieta, Ca. 92562951-579-7146Website http://www.mobile..., The factory stereo installed in the Chevy Colorado only has an AM/FM stereo tuner and a CD player. Many aftermarket stereos, on the other hand, have auxiliary inputs, iPod control ..., May 14, 2018 · P0171, P0174, P0300. Hello everyone, first time on this forum but my trucks got me stumped. Im trying to get my truck to pass emissions, but I've got DTCs and that's an automatic fail where I live. The previous owner sold it because he couldn't get it to pass emissions either, so far I've changed the intake manifold gaskets and MAF sensor, the ... , 6 years 6 months ago - 6 years 6 months ago #13991. 2008 Chevy Silverado 2500hd 6.0 P0174 and a p0171 was created by drogan. 2008 Silverado 2500 6.0 has a p0171 and a p0174. Intake was smoked with no leaks truck came to me with 8 new injectors a new fuel pump new map and mass air flow sensor and new intake gaskets., Chevy Mechanic: ironmike. the gaskets are the most common. The O2 sensors will have a high positive fuel trim (vacuum leak) and they will shoot up from low mV to maybe 800 mV (when spraying intake) and the fuel pump is a possibilty. Fuel pressure should be 55-62 psi. Edited by ironmike on 5/22/2010 at 3:33 PM EST., , Chevy Mechanic: ironmike. the gaskets are the most common. The O2 sensors will have a high positive fuel trim (vacuum leak) and they will shoot up from low mV to maybe 800 mV (when spraying intake) and the fuel pump is a possibilty. Fuel pressure should be 55-62 psi. Edited by ironmike on 5/22/2010 at 3:33 PM EST., Aug 31, 2023 · The Engine Control Module measures the amount of oxygen in the exhaust system via the oxygen sensors and makes adjustments by adding more or less fuel to the mixture. When the adjustments become too large to maintain the proper mixture, the fault codes P0171 and P0174 are logged. They are logged together since, in V8 and V6 (and more rarely in ... , Sep 27, 2009 · The following diagnosis might be helpful if the vehicle exhibits the described symptoms. Check Engine Light with a P0300 due to 2 - 4 cylinders misfiring on the same bank of the engine. DTCs P0171, P0172, P0174 or P0175 may also set for the misfiring bank. Perform a fuel injector balance test for all 8 cylinders. , p0171 and p0174. Guys, I need some help here. I have a 2004 Silverado, 2500HD 4wd. The knock sensors were bad so I replaced them. I got a new intake gasket when I put it back together and ever since I've been blowing these two codes. When I keep the engine under 2K RPMs it is fine, but under a load it loses power and starts to backfire., 1999 Chevy Silverado Codes P0327, P0171, and P0174 Okay guys I'm back with the same problem. Here is what I have done since Aug. 2008 I have replaced the MAF sensor, air filter, knock sensor, fuel pump, coil, tps, fuel filter, distributor cap and rotor. But guess what I am still having the same codes in this order P0327,P0171, and P0174. I am ..., 56 posts · Joined 2009. #1 · Feb 18, 2014. Folks, I'm having some issues with DTC codes P0300 and the random P0171 and P0174. I'm running a Bully Dog GT Gas tuner and KN CAI (recently added and code started shortly after). I've cleaned out the MAF several times, checked the plug wires and coils, check hoses and lines and can't seem …, Feb 22, 2024 · My truck will start right up in the cold at a high idle but then will stall out after a few seconds. This issue only occurs whenever the temp dips below around 40 degrees F. Getting engine codes P0171 & P0174. Truck also sputters and acts like it's going to die when it rains. , P0171 and p0174 2002 Chevy Silverado. Her lately my truck has been pull codes p0171 and p0174. Which is for a lean condition on bank 1 and 2. Their is no vacume leak, the valve gasket is good. I'm thinking it's the mass air flow or the O2 sensors., If you’re looking into buying a dependable new or used truck, you’ve likely come across the 2020 Chevy Silverado in your search. The Silverado is consistently one of the most popul..., Feb 19, 2014 ... GMC/Chevrolet Truck/SUV - PO171 and P0174 Cold Engine - I have a 99 Silverado 5.3 liter V8. I'm getting these two codes, P0171 and P0174 and ..., Jan 19, 2021 · I have a 2004 Silverado Z71, 5.3 with 154K miles. Other than this problem the ruck runs great. I had the fuel lines and fuel pump replaced two months ago and after that, I started to get the P0171 and P0174 (bank 1 and 2 lean) and the long term fuel trims "LTFT" are 18-25% (both) There were no signs of issues cold or warm. , Hello, 2004, 2500HD, 6.0L, 4X4 with 131,000 miles all original no after market modes. I have P0171 and P0174 codes. My effort. New -. Fuel Tank Pressure Sensor, Gas Cap,Canister Purge Valve, Evap canister vent solenoid, fuel pump (55psi running), Mass flow sensor, air filter. Basically every item new in the evap system with the excepetion of ..., Hi Everyone: So I did the fuel injector cleaning just for the Injectors, the engine ran a little better but still high fuel trims!The engine was full of carb..., The fault codes are coming up as p0171 and p0174 running lean on both banks, it's running rough at idle and will sometimes stall ... A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, …, Here are the most common causes of P0175 in the Chevy Silverado: Vacuum Leaks– With the Chevy Silverado, a vacuum leak is one of the most common causes of the P0175 code.Take a look around and see if you can find a vacuum leak. Here’s a great YouTube video on how to find a vacuum leak.; Oxygen Sensor– The P0175 code …, IT held him to start with the easy and less expensive repair. He said it would be the fuel pressure regulator. 1998 Chevy Silverado 1500 4 - W 5.7 Vortec. Warning lights = check engine soon. Computer codes = P0174 Bank 2, P0171 Bank 1. Repairs made= New fuel pump - replaced fuel pressure regulator (FPR) - cleaned the mass air flow sensor ( MAF ..., A P1174 & P1175 trouble code means that your air to fuel ratio is either running too lean or too rich. Engines will have two banks. In traditional V-shaped engines, the 2-4 cylinders (depending on whether it is a V4 or V8, etc.) on the left side are considered “Bank 1” and the cylinder on the left are considered “Bank 2”., On rare occasions, some customers may experience a hard start cold, brief rough running on cold start, black exhaust color, and/or SES light. If a SES light is experienced, DTCs P0172 and/or P0175 may be stored. If driveability symptoms are experienced, they will generally diminish within 1 minute of start up., Dec 14, 2023 · Trouble Code - P0171, P0174. Been getting occasional P0171, P0174 codes but the truck (07-13 Silverado 1500) runs great, idles great and is otherwise not having any performance issues at all. I cleaned the MAF, and throttle body, and installed 4 new Oxygen Sensors (Denso) and still getting occasional P0171, P0174 codes. , What Do P0171 and PO174 Mean? Related: Diagnostic Trouble Codes. Share. Code P0171 indicates Bank 1 of the engine has a lean fuel mixture. P0174 indicates Bank 2 of the …, For more information be sure to visit: http://www.johnsadlersautorepair.com, 2007 Chevy Silverado 6.0 is getting P0171 and P0174. Ive replaced the brake switch because the C0561 came up also. It - Answered by a verified Chevy Mechanic, Jan 25, 2022 ... So I am gettin the dreaded P0171 P0174 Bank 1 and 2 too lean codes. Truck is a 2004 Z71 Tahoe 5.3Z engine. Truck is running smooth.