Code p0174 chevy silverado

P0174 is a diagnostic trouble code (DTC) for "System Too Lean (Bank 2)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 .

2004 Chevy Silverado 1500Z71 5.3 Vin ***** this truck has 2 codes P0171 and P0174 I done some testing on this truck fuel pressure key on is 56psi fuel pressure at idle 1500 rpm 62 psi MAF … read moreHe 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 ), replaced fuel filter and o2 sensors.Well basically, over all you motor is running lean to a point that it is beyond the programmed limits and threw the code. ... (check, fuel ...What is the Cost to Diagnose the Code P0174 2018 Chevrolet Silverado? Labor: 1.0. To diagnose the P0174 2018 Chevrolet Silverado code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type.May 14, 2018 · Are the P0171, P0174, and P0300 the only codes you have stored? ... Enjoy banner ad-free browsing with Chevy Silverado and GMC Sierra Forum Plus. Learn more. 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. ... P0174 Code Chevy. If your Chevy is displaying a P0174 code, it means that the engine is running too lean. This can be …

Hey gang – wanted to share my experience working through the P0171 and P0174 (too lean bank 1 and too lean bank 2) codes. 2003 Tahoe LT 5.3 flex fuel engine, 79,700, bone stock. Background: I was tinkering with the truck a few weeks ago trying to see if I could eek out any more MPGs and...P0174 code. 983 Views 3 Replies 2 Participants Last post by chem_man, Apr 8, 2021 Jump to Latest N. Newton2213 Discussion starter ... Enjoy banner ad-free browsing with Chevy Silverado and GMC Sierra Forum Plus. Learn more.Feb 19, 2014 · My 1999 chevy silverado with a 4.3 motor has 3 codes. p1345,p0171,and p0174. i have changed the crank sensor and the cam positioning sensor and still have codes! please help Posted by Gene Rosenzweig on Feb 19, 2014 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 ...The P0496 code indicates that there’s an incorrect amount of intake vacuum flow occurring in the car’s EVAP system. Any time this vacuum is higher than what the computer determines is appropriate, the codes will be set. While this code can occur with all brands, it appears to be most common with GM vehicles.A mechanic will use an OBD-II scanner to identify codes and then address them in order of storage. A P0451 code is usually stored after other related codes. P0451 Chevy Silverado Trouble Code – Symptoms and Possible Fixes Repair options. If you have an EVAP problem, your Chevy Silverado may have a P0451 code.The most common fix for P0420 in the Chevy Silverado is a new catalytic converter, followed by an O2 sensor replacement. Before taking your Silverado into an exhaust shop for an (expensive) new catalytic converter, let’s ensure that’s what you need. Here’s a good P0420 diagnostic order for the Chevy Silverado: 1. Check for Other Codes

Note: The definition of the U0107 code can be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition. What are the Common Causes of the U0107 Code? These are the most common issues related to the U0107 code: Faulty CAN bus wiring; Dead battery; Faulty TAC control ...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.Engine Code P0171, P0174. Jump to Latest Follow 101169 Views 22 Replies 12 Participants Last post by mmanville01, Sep 25, 2020. Willfull04 Discussion starter ... Enjoy banner ad-free browsing with Chevy Silverado and GMC Sierra Forum Plus. Learn more.2013 chevrolet silverado 6.0 2500 codigo de falla p0171 y p0174 con un servicio de boletin el problema la tapadera del motor hace contacto con el tubo de l...May 2, 2018 · 2009 Sierra, 5.3L. 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. These are estimated costs to Fix p0175 Chevy Silverado: Vacuum leak- $100-$200. Air-fuel sensor/ Oxygen sensor- $200-$300. Repairing the exhaust- $100-$200. Fuel pressure regulator- $200-$400. Fuel pump- $1300-$1700. Cleaning the mass air flow sensor- $100. Replacing the mass air flow sensor- $300.

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Feb 19, 2014 · My 1999 chevy silverado with a 4.3 motor has 3 codes. p1345,p0171,and p0174. i have changed the crank sensor and the cam positioning sensor and still have codes! please help Posted by Gene Rosenzweig on Feb 19, 2014 Oct 21, 2020 · =============================Claim your FREE engine code eraser 👉 https://free.nonda.co 👈==== How to Fix P0174 ============Engine Code P0174 Saving Repair ... 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 ...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 ... P0172 and P0175: System Too Rich. Code P0172 indicates Bank 1 of the engine has a rich fuel mixture. P0175 indicates Bank 2 of the engine has a rich fuel mixture. Engine Bank 1 is the same side of the engine as Engine Cylinder 1. Engine Bank 2 is the opposite side of the engine. A firing order and cylinder location diagram may be needed to see ...Jun 19, 2011 · Bank 2: A P0174 DTC tells you that bank 2 is the one having the issue. Bank 2 is the engine bank that holds the spark plugs for cylinders 2, 4, and 6 (V6 4.3L). Cylinders 2, 4, 6 and 8 (V8 5.0L, 5.7L). This bank is the one on the passenger side of the engine. The main sensors responsible for telling the PCM that there's a problem with the air ...

Nov 26, 2019 · How To Fix – Chevy Silverado P0171 Trouble Code. By. John Huh - November 26, 2019. 1. SHARE. ... P0174 – Lean diagnostic trouble code; Possible Causes of P0171 ... Buenas tardes colegas, tengo una Silverado V6, 4.3L, mi problema es el siguiente, me prendio el Check Engine y al escanear la camioneta nos arrojo el codigo ...Feb 6, 2019 · In this video I have a look at a 2008 Chevrolet Silverado 1500 5.3 that came in with codes P0171 and P0174 indicating that the engine is running lean. It doe... Jul 11, 2018 · Symptoms: P0171 + P0174 Chevy Silverado. There aren’t always drivability issues associated with these codes. For most people the first sign that anything is wrong at all is the service engine soon light coming on. Here are the typical symptoms that something is wrong when your Silverado has codes P0174 and P0171. Rainman69 Discussion starter · #17 · Jan 2, 2018. I put in a new Delphi fuel pump and Maf sensor.The P0171 and P0174 codes went away.It could have been the Maf sensor or the crappy K&N intake might have been leaking.The fuel pressure is still low 50 with a new pump.I'm getting P0300 code at idle.When I hooked scanner up it's misfiring …P0174 Generic 1. Fuel Trim System Lean Bank 2 P0220 1. Throttle Position (TP) Sensor 2 Circuit 2. Throttle Position (TP) Sensor 2 Circuit. ... That code indicates a failure of the tp sensor and because it is internal you have to replace the whole tb. Hope this helps and if you have any other questions feel free to ask. D.As of 2015, the towing capacity of a Chevrolet Silverado 1500 is rated up to 12,000 pounds, depending on the model and configuration of the truck. The average Chevy Silverado 1500 is designed to have a towing capacity of at least 7,600 poun...P0157 Causes: Chevy Silverado. Here are the most common issues that cause the P0157 code in the Chevy Silverado. They are presented in order (somewhat) of most to least likely to cause the problem. Bad Oxygen Sensor– The O2 sensor itself is one of the most likely reasons that P0157 is triggering your service engine soon light. …The P0174 code indicates that your powertrain control module (PCM) detects a lean running condition. The P0171 and P0174 trouble codes indicate the lean running conditions . The P0171 trouble code triggers when PCM detects a lean condition in cylinder bank 1 , while P0174 triggers when PCM detects a lean condition in cylinder bank 2 .What Causes the P0174 Code? The most common causes of the P0174 code are the following: Vacuum leak due to damaged intake manifold gaskets or punctured vacuum and positive crankcase ventilation (PCV) hoses; Malfunctioning mass airflow (MAF) sensor; Clogged fuel filter; Failing fuel pump; Clogged fuel injectors

Ok -Just went through this on mine. Same codes P0171 and P0174. Only 33000 miles. ... Enjoy banner ad-free browsing with Chevy Silverado and GMC Sierra Forum Plus ...

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. P0171 code definition System Too Lean (Bank 1) What the P0171 code means The P0171 OBD-II code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the …MEMBER. 1999 CHEVROLET SILVERADO. Hi. I keep getting codes P0171 and P0174. I have a 99 chevy silverado 5.3L. I already cleaned MAF sensor and replaced air and fuel filter and put new pcv valve and put new plugs and wires on it. I can't hear any vaccum leaks either so I'm puzzled what could cause this. Any help would be great.I ran a P0174 code the other day while driving but the truck ran like normal, had no weird noises, or weird idle. I opened the hood and cleaned the MAF sensor and listened for vacuum leaks but couldn't find anything. I reset the truck but the codes came back after I drive for about an hour. Could use any help.Hi Dale, Code P2272 is a code indicating the O2 sensor post catalyst on bank 2 is staying lean all the time. This is due to a defective sensor or an exhaust leak in front of the sensor in most cases. This will cause the vehicle to fail emission testing. Feb 27, 2020 • Ford Cars & Trucks.The 2019 Chevy Silverado 1500 LTZ is the perfect truck for those who want to cruise in style. With its sleek design, powerful engine, and luxurious interior, this truck is sure to turn heads wherever you go. Here’s a closer look at what mak...Chevy Mechanic. Vocational, Technical or Tra... 2,417 satisfied customers. 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.Aug 21, 2022 · What is the Cost to Diagnose the Code P0174 2015 Chevrolet Silverado? Labor: 1.0. To diagnose the P0174 2015 Chevrolet Silverado code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type.

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Overview of the causes and fixes P0102 OBDII engine error code on a Chevy Silverado. Read more information here: https://www.backyardmechanic.org/cause-and-f...Mar 10, 2009 · P0171 System too Lean (Bank 1) P0174 System too Lean (Bank 2) If a car has a check engine light on and has P0171 and P0174 codes stored, the most likely cause is a vacuum leak. These codes are set by the car’s computer when it sees too much oxygen in the exhaust. Excessive oxygen readings in the exhaust will set lean codes. P0174 is a diagnostic trouble code (DTC) for "System Too Lean (Bank 2)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 .However, some Chevrolet vehicles do use this code. ... See also P0174 Code: System Too Lean (Cylinder Bank 2) How to Fix the P069E Code. As mentioned above, ... I’m experiencing the exact same thing on my 2008 Silverado along with code P069E and P0191. The only difference is I just put in a new aftermarket fuel pump …Apr 20, 2015 · 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... I have a 2002 chevy silverado w/5.3L V8, was receiving the P0171 & p0174 codes, replaced the MAF and now receive the P0101 code with an occasional P0175 code. ... getting codes 171 and 174 on chevy silverado 2001. …2008 Chevrolet Silverado P0174, P0300 Truck Was Dropped Off With Check Engine Light Concern. Pulled Codes And Found All Cylinders Mis-firing One Time Or Another.The weight of a Chevy Silverado varies based on the model, cab type, bed size and engine type. For example the 2015 Chevy Silverado 1500 with a regular cab and long box weighs 4,689 pounds with a 4.3-liter, V6 engine or 4,792 pounds with a ... ….

Nov 1, 2018 · 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. 2003 Chevy Silverado CK Engine Code P0171 and P0174 FUEL SYSTEM LEAN BANK 1 AND 2 WHAT IS THE FIX FOR THIS TROUBLE CODES - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website.Pull the old MAF sensor out of the air filter housing pipe 4, then unclip the connector with the help of a flat-tip screwdriver 5.Be careful not to damage the wiring connector or the wires ...Apr 12, 2023 · A P0174 is a trouble code that appears when the O2 sensor on bank 2 feels that the air-fuel mixture is out of balance, and this imbalance is beyond its ability to correct it. There are several possible reasons for this. Here is everything you need to know about the P0174 code. Table Of Contents show P0174 Definition P0174 – System Too Lean (Bank 2) 1999 chevy silverado with p1345,p0171,andp0174 my 1999 chevy silverado with a 4.3 motor has 3 codes. p1345,p0171,and - Cars & Trucks question. Search Fixya ... All of these p1131 p1151 p0171 p0174 codes indicate a problem with a lean condition. This engine is known for vacuum leaks, so before you start throwing oxygen …what is chevy code p0174 2005 5.3 - Chevrolet 2005 Silverado 1500 2WD question. Search Fixya. Browse Categories Answer Questions ... chevy silverado codes p0174 code chevy truck 2000silverado5 3codesp0171... 2005 chevy silverado 1500 2wd p0174 chevy silverado ...Chevrolet Traverse GMC Acadia 2016 2016 Acadia Limited (VIN R, V) 2017 2017 Involved Region or Country North America, South America, Middle East, Israel and China Condition Some customers may have one or more of the following concerns: • MIL illuminated • Rough idle • Low power Some technicians may find any of these DTC's set for the bank ...What is the Cost to Diagnose the Code P0174 2018 Chevrolet Silverado? Labor: 1.0. To diagnose the P0174 2018 Chevrolet Silverado code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type.Feb 17, 2023 · Vocational, Technical or Tra... 28,691 satisfied customers. chevy avalanche: 2007 Chevy Avalanche 1500 4WD LT 5.3L. Stock. 2007 Chevy Avalanche 1500 4WD LT 5.3L. Stock. Getting codes P0420 (cat inefficiency bank 1), P0171 (Bank 1 too lean), P0174 (bank 1 … read more. Code p0174 chevy silverado, Jan 8, 2015 · P0171and P0174 CODES CHEVY VORTEC ENGINE.Ron WilliamsMobile Fix Automotive26793 Madison Ave Suite 100Murrieta, Ca. 92562951-579-7146Website http://www.mobile... , SOURCE: codes p171 and p0174 on a chevy truck? ... SOURCE: P0420 & P0430 codes 99 silverado. codes p0420 and p0430 are both post o2 sensors, the ones after the convertor, both sides if replacing. Posted on May 18, 2009. Helpful 0 ; Not Helpful; Flag Ad. Anonymous . 1129 Answers ; SOURCE: codes ..., Oct 25, 2019 · Brian Eslick from How to Automotive http://www.howtoautomotive.com takes you step-by-step through the process of diagnosing code P0171-P0174 lean bank 1 and ... , 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..., Bank 2: A P0174 DTC tells you that bank 2 is the one having the issue. Bank 2 is the engine bank that holds the spark plugs for cylinders 2, 4, and 6 (V6 4.3L). Cylinders 2, 4, 6 and 8 (V8 5.0L, 5.7L). This bank is the one on the passenger side of the engine. The main sensors responsible for telling the PCM that there's a problem with the air ..., Well basically, over all you motor is running lean to a point that it is beyond the programmed limits and threw the code. ... (check, fuel ..., 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 ... , Popular Engine Codes P0420 P0172 P0171 P0128 P0300 P0456 P0430 P0442 P0455 P0113. Or check out our Diagnostic Trouble Codes Directory if you don’t see your code in the list of popular codes above. The Chevy Silverado & Other Chevy Check Engine Lights. If you’ve got a Silverado, check out our article on the best and worst years of the Chevy ..., Chevy Silverado P0171 and P0174 Trouble Codes. July 11, 2018 by Jason. P0171 and P0174 both indicate that there is a lean condition present in your Chevy Silverado. By themselves, these are some of the …, SOURCE: codes p171 and p0174 on a chevy truck? Subject: 97-05 Vehicles with 4.8 5.3 5.7 and 6.0 Gen III V8 Engines and Misfires on One Bank - kw CEL diagnostics driveability DTC P0171 P0172 P0174 P0175 P0300 P0301 P0302 P0303 P0304 P0305 P0306 P0307 P0308 #PIP3056 - (07/12/2004), Jan 5, 2019 · 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. , 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 …, 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”., 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. , When to Replace Your Chevy Silverado’s Parts to Address the P0507 Code. If your Chevy Silverado is displaying the P0507 code, it is likely due to an issue with the idle speed control system. This system is responsible for controlling the idle speed of the engine, and when it is malfunctioning, it can cause the engine to idle too high., 7.1K Share 908K views 7 years ago The vehicle being worked on is a 2004 Chevy Suburban with a 5.3L engine. It had multiple trouble codes in memory P0171 and P0174 (fuel system too lean bank 1..., 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., What is the Cost to Diagnose the Code P0174 2017 Chevrolet Silverado? Labor: 1.0. To diagnose the P0174 2017 Chevrolet Silverado code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the …, trouble code (DTC). • Fuel Trim DTC P0171 and/or P0174 may set. • Misfire DTC P0300 may set. • Heated oxygen sensor (HO2S) or oxygen sensor (O2S) DTCs may set. • ATraction Control, Stability System or ABS lamp ... • …, P0174 Chevy Silverado. Incorrect fuel injection operation frequently results in the Chevy Silverado throwing the P0174 code. Typically, a lean engine condition will …, P0172 and P0175: System Too Rich. Code P0172 indicates Bank 1 of the engine has a rich fuel mixture. P0175 indicates Bank 2 of the engine has a rich fuel mixture. Engine Bank 1 is the same side of the engine as Engine Cylinder 1. Engine Bank 2 is the opposite side of the engine. A firing order and cylinder location diagram may be needed to see ..., P0174 code. 983 Views 3 Replies 2 Participants Last post by chem_man, Apr 8, 2021 Jump to Latest N. Newton2213 Discussion starter ... Enjoy banner ad-free browsing with Chevy Silverado and GMC Sierra Forum Plus. Learn more., 2004 Chevy Silverado 1500Z71 5.3 Vin ***** this truck has 2 codes P0171 and P0174 I done some testing on this truck fuel pressure key on is 56psi fuel pressure at idle 1500 rpm 62 psi MAF … read more, If your car displays the P0174 engine code, you may have a problem with your fuel injection system. Here's what P0174: System Too Lean means and how to fix it. ... Chevrolet Silverado. Chevrolet Malibu. Ford Escape. GMC Sierra. Honda Accord. Honda Civic. Hyundai Tucson. Jeep Cherokee. Jeep Wrangler. Kia Forte. Mazda 3. Nissan …, I have a 2000 Silverado 5.3 with the codes P0171, P0174, P0420. I am completely stumped right now. My mechanic replaced the intake manifold gasket, which was blown, as well as the MAF. I know P0420 is catalytic converter but here's the thing. The truck, after having all that replaced still wants to stall in the garage and whenever I try to …, Aug 10, 2016 · Pulled codes and discovered the "lean codes" P0171 and P0174, There was also a transmission related code, which was not unexpected. Next steps: Removed the transmission and took it for bench rebuild, flushed cooling lines and installed the rebuilt transmission with new torque converter. Cleared codes and road tested. , 2001 Chevrolet Silverado RWD 4.3 L V6 Code P0171 P0174 P0300 The symptom is, when the engine starts, but it won't last - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website., These are estimated costs to Fix p0175 Chevy Silverado: Vacuum leak- $100-$200. Air-fuel sensor/ Oxygen sensor- $200-$300. Repairing the exhaust- $100-$200. Fuel pressure regulator- $200-$400. Fuel pump- $1300-$1700. Cleaning the mass air flow sensor- $100. Replacing the mass air flow sensor- $300., P0174 is a diagnostic trouble code (DTC) for "System Too Lean (Bank 2)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 . , trouble code (DTC). • Fuel Trim DTC P0171 and/or P0174 may set. • Misfire DTC P0300 may set. • Heated oxygen sensor (HO2S) or oxygen sensor (O2S) DTCs may set. • ATraction Control, Stability System or ABS lamp ... • …, In this video I have a look at a 2008 Chevrolet Silverado 1500 5.3 that came in with codes P0171 and P0174 indicating that the engine is running lean. It doe..., trouble code (DTC). • Fuel Trim DTC P0171 and/or P0174 may set. • Misfire DTC P0300 may set. • Heated oxygen sensor (HO2S) or oxygen sensor (O2S) DTCs may set. • ATraction Control, Stability System or ABS lamp ... • …, An engine code P0171 may be caused by one or more of the following: A vacuum leak in the intake manifold or elsewhere in the engine. A leaking or dirty mass airflow sensor (MAF). An exhaust gas recirculation (EGR) system that is not working properly. A faulty oxygen sensor.