P0171 cadillac ats 2013

2013 ATS STD with 32k - P0171 left bank too lean code - dealer says 'bad gas'. :| 21656 Views 33 Replies 18 Participants Last post by Sergio526 , Jan 30, 2019 Jump to Latest R

P0171 CADILLAC Description. The Engine Control Module (ECM) controls the air/fuel metering system in order to provide the best possible combination of driveability, fuel economy, and emission control. ... 2013 CADILLAC ATS ENGINE (PWS) 2007 CADILLAC SRX ENGINE AND ENGINE COOLING:ENGINE .Diagnosis: Driving with trouble code P0137 is acceptable but only for a short period of time. Driving with this code for an elongated period of time could result in greater engine damage if it is being caused by a lean air/fuel ratio. Common Reason: Code P0137 is often related to a bad O2 Sensor. Oxygen sensor 2 is the downstream oxygen sensor ...P 0171 is a fuel trim (lean) problem with cylinder bank 1-3-5. Check the injectors for pulse ticks - stethoscope. Vacuum leak checks, particularly in the PCV dirty air line (connected to full manifold vacuum). OBDII diagnostics. Trouble codes description for GM. OBDII/EOBD diagnostic code definition.Feb 23, 2023 · Code P0171 Cadillac Tech Notes. The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 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 ... P0171/p0174. OK this has been annoying me for months and now that it's warming up it's time to hunt it down. '05 STS V8, under 60K miles, runs fine drives fine starts and idles fine. Gets a P0171 and sometimes also P0174 trouble code, at seemingly random and infrequent times. Have tightened the intake manifold bolts to spec, checked all hoses ...Reply Save pissedoffwookiee · #3 · Feb 23, 2016 rbrooks said: Hello, Like the title says, my '13 that I've had for 3 weeks now threw the code P0171. I took it back to the dealer who prounounced it bad gas and said, 'Just drive it until it goes away'.Labor: 1.0. To diagnose the P013A Cadillac 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. It is common for most auto repair shops to charge between $75 and $150 per hour.PCM P0171 current (fuel system lean bank one) ... 2010 MINI JCW x 2, 2013 BMW X3 M Sport; Engine: Other (not listed) ... General Cadillac Forums ; P0171 & P0174 Theme ...

Jul 7, 2020 · P0171 and P0174 occur when the air/fuel mixture on the vehicle gets too lean. They are both thrown when the oxygen sensors detect that there is not enough oxygen in the exhaust. The engine then makes adjustments to compensate and throws these codes, which trigger the service engine soon light. When these codes both appear at the same time, it ... Has your car been triggering the P0171 code or related codes? No need to worry. Our experts cover what to expect.The reason your Cadillac ATS shakes at idle but smooths out when accelerating is that the engine is spinning faster, which smooths out any misfires. If a motor mount is causing the problem, once you put the car into gear, the torque from the engine will hold it against the frame. It can be very jarring when your Cadillac ATS shakes when idle.Automotive Diagnostic Spe... General auto certifications. 39,507 satisfied customers. 2014 Cadillac ATS 2.0t, Loss of power, rough idle, engine. 2014 Cadillac ATS 2.0t, Loss of power, rough idle, engine shutting off with codes P0011, P0016, P228C, P0171 … read more.We carry emission system parts like the MAP sensor, purge valve, oxygen sensor, solenoid valve and vapor canisters. When you need ATS parts, then you can be sure GMPartsCenter.net will get the lowest total price shipped direct to your door on all your Cadillac parts. We are proud of our quick order processing - same day shipping in most cases ... Feb 23, 2023 · Code P0171 Cadillac Tech Notes. The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 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 ... P 0171 is a fuel trim (lean) problem with cylinder bank 1-3-5. Check the injectors for pulse ticks - stethoscope. Vacuum leak checks, particularly in the PCV dirty air line (connected to full manifold vacuum). OBDII diagnostics. Trouble codes description for GM. OBDII/EOBD diagnostic code definition.

P0174 P0171 P0496 P0442 FIXED FAST & EASY CADILLAC CTS COUPE! VACUUM LEAK FOUND! P0174 - System too lean bank 2P0171 - System too lean bank 1 P0496 - Evapora...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 engine.How to Fix the P069E Code. As mentioned above, there are a lot of possible repair solutions for OBD-II codes.The P069E code is not an exception. Its repair depends not only on the root cause but also on the vehicle’s make and model.P1116 ECT Signal Unstable Or Intermittent - Read Our Article on Intermittent Diagnosis For Help With This Cadillac Check Engine Light Code. P1117 Engine Coolant Temp Signal Out-Of-Range Low. P1118 Engine Coolant Temp Signal Out-Of Range High. P1119 ECT Signal Out Of Rage With TFT Sensor.Code P0174 Cadillac Tech Notes. 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 ...

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You will find a leak or a faulty one-way valve that is causing the P0171 code in most cases. Check the fuel pressure. Connect a fuel pressure gauge to the fuel rail and make sure that the fuel pressure is correct. If it is too low, check the fuel filter, fuel pump, fuel pressure, and regulator. Check the EGR valve.5 Şub 2020 ... For the last 4-6 weeks, I'm been trying to resolve P0171 & P0174 ... Cadillac CTS-V Forum. in this thread in this sub-forum in the entire ...Technicians may find DTC P0171 set. Check possible causes per normal SI diagnostics and correct other conditions as applicable. Recommendation/Instructions Check the engine mount vacuum control system for leaks with vacuum only. Do not use positive pressure to check the engine mount vacuum control system for leaks at the tank.We carry emission system parts like the MAP sensor, purge valve, oxygen sensor, solenoid valve and vapor canisters. When you need ATS parts, then you can be sure GMPartsCenter.net will get the lowest total price shipped direct to your door on all your Cadillac parts. We are proud of our quick order processing - same day shipping in most cases ...

Your car is equipped with a lot of engine sensors that are essential to keeping your vehicle running. The OBD-II code P015b indicates the PCM has detected a delayed response from the bank 1 sensor 1 oxygen (O2) sensor.If your scanner logs this code, the guide below will help you address it.2013-2018 Cadillac ATS 2014-2018 Cadillac CTS 2016-2018 Cadillac CT6 2013-2018 Chevrolet Malibu 2016-2018 Chevrolet Camaro 2018 Chevrolet Equinox, Traverse 2018 GMC Terrain 2018 Holden Commodore, Equinox Equipped with 2.0LTurbo Engine (RPO LTG) Attention: This PI also applies to any of the above models that may be Export from …16 Oca 2023 ... PCV Hose from Amazon with the easy connectors: https://www.amazon.com/dp/B0BLS3MWKL?psc=1&ref=ppx_yo2ov_dt_b_product_details Fuel Line ...Jan 21, 2022 · 2013 ATS 2.0 AWD Premium with 70k miles. Christmas eve I was driving from Central Ohio to Central Illinois and 4.5 hours in to the drive, gently accelerating up an on ramp, the dash lit up. Service Stabilitrack, traction control off, reduced engine power, I immediately pulled over and had the car put on a flatbed and taken to the local dealership. Nov 25, 2019 · 2013 ATS 2.0L , 85,000 miles -p0171/bank 1 too lean trouble. I just bought this car a couple months back and noticed the CEL would randomly come on and then go away on its own.now it is staying on!! so far this is where im at: Hooked my scanner up and pulled the code, checked o2 readings. They looked fine so I started new air filter and with ... Cadillac Maison, Phnom Penh. 61,187 likes · 55 were here. We provide sofa, furniture best price in cambodia. There are thounsand buyer happy after order fromP0174 indicates that your Cadillac CTS is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0174. It’s unlikely that you’ll see P0171 if this is the case.Aug 25, 2018 · The P0301 trouble code will trigger your ATS’s check engine light. The car itself may begin to run rough. It depends on how serious the misfire is. The vehicle may produce excess vibration, especially at lower RPM. Fuel mileage may suffer. You may smell raw gas coming from the tailpipe. The ATS may backfire. List of car modifications of Cadillac ATS [2013-2019] with 5x115 bolt pattern | Wheel-Size.com. Wheel- Size.com The world's largest wheel fitment database. Source for tire and wheel application fitment data. Last Update: Oct. 23, 2023, 8:32 a.m. Bolt patterns (holes, pcd), 5x115.Cost to Drive Cost to drive estimates for the 2013 Cadillac ATS Standard 4dr Sedan (2.5L 4cyl 6A) and comparison vehicles are based on 15,000 miles per year (with a mix of 55% city and 45% highway ...Intermittent loss of power when check engine light on ! Please don’t forget to like, comment, share and subscribe. Thank you all Follow Us CSCTECHDEP on Face...

Feb 28, 2020 · Code P 0171 - 2013 ATS engine 2.5. Check engine light came on so I had it checked. Then code P 0171 came on took the mass air flow off cleaned it, but the light still on any suggestions. P 0171 refers to a lean fuel condition, Bank 1 - probably nothing to do with the MAF.

P0171 and p0174. Jump to Latest Follow ... 2013 Cadillac SRX Luxury, 3.6L V6 2000 Pontiac Firebird Trans Am, convertible, ... Cadillac Forums is the perfect place to go to talk about your favorite Caddys including the …Feb 26, 2022 · P0171 definition: Bank 1 has too much air or not enough fuel. Issue Severity: MODERATE– Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible to avoid damage to spark plugs, pistons, and catalytic converters. Diagnosis: It is important to complete the entire diagnostic ... What the P1101 code means. When a P1101 trouble code is stored, it means that the PCM detected a discrepancy with the voltage from the MAF sensor. This problem can be detected while the PCM is running a self diagnostic called a Key On Engine Running (KOER) test. When the voltage from the MAF sensor is greater or lesser than the voltage allowed ...0:00 / 11:34 2013-2018 Cadillac ATS 2.0T - P0171 Vacuum Leak - EASY FIX Jeff Lyle 1.3K subscribers Subscribe Share 5.2K views 8 months ago PCV Hose from Amazon with the easy connectors:...P0174 P0171 P0496 P0442 FIXED FAST & EASY CADILLAC CTS COUPE! VACUUM LEAK FOUND! P0174 - System too lean bank 2P0171 - System too lean bank 1 P0496 - Evapora...With the P0133 code, you know you are dealing with a fault related to the oxygen sensor on bank 1. It’s related to sensor 1. However, this same fault can occur with the other oxygen sensors. The only way to know the difference is because the code won’t be the same. Here are the two other codes that would occur on Bank 1.The P0171 code is thrown when the bank one sensor one O2 sensor reports that your CTS’s engine is running lean. The sensor on or right after the exhaust manifold is typically the sensor that reports the lean condition. …The P0171 code indicates that the oxygen (O2) sensor on bank 1 sent a signal to the engine control module that the air-fuel mixture is too lean to be corrected. The O2 sensors have the ability to correct a fuel mixture of +-15%. If it needs to be corrected more than that, the P0171 code will be stored. P0171 SymptomsSystem Lean. The code is thrown when the oxygen sensors detect the air-fuel mixture is “lean” (too much air or not enough fuel). The vehicle’s PCM will add more fuel to the mixture to bring the air-fuel mixture where it needs to be for optimal combustion. It also throws the code P0171 to let you know it has done this.Oct 5, 2018 · 4’th Cylinder. P0304 is a cylinder-specific misfire code, meaning only your ATS’s fourth cylinder has a misfire. Before you can even diagnose P0304 in your car, you need to find the fourth cylinder’s location. On “V” configuration engines, it’ll usually be the second cylinder on the head further away from the front of the engine.

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12 posts · Joined 2020. #8 · Feb 16, 2021. I have the exact same two codes PO700 and PO711 the car runs fine, just have the check engine light. 2017 Cadillac ATS Sedan 2.0 Turbo AWD 54,000 miles. Does Serafin 44 have a follow up as to what was repaired, was it under warranty etc., Reply. Save.P0171 Fuel Trim System. P0324 Knock Sensor/Knock Sensor Processor. ... 2013-2017 Cadillac ATS LTG LCV Engines, All VINS. 2016-2017 Cadillac CT6 LTG Engines, All VINS ... Symptoms. Causes. Common Fixes. Questions. P0171 Definition: Fuel Trim System Lean Bank 1. P0171 is a generic code, meaning it has the same definition for the …Jun 14, 2019 · P0171 Code. Hi in the past 1000 miles I have had the P0171 check engine light code come on roughly 4/5 times and I erase the code but comes back. It looks like it comes on when sitting at idle for a bit never came on while driving..only in idle. looked up what is may be (maf sensor,02 sensors,vacuum leaks) I cleaned the maf with crc cleaner and ... About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...ATS Forums - 2013-2019. ATS General Discussion Forum. P059f P069e U0284. Jump to Latest Follow 21K views 9 replies 6 participants last post by NoTime4Gamez May 9, 2023. T. tahawk69 Discussion starter ... Austin J. Cadillac Customer Care. Reply. Save. R. redhead_823.P0021 definition: Intake Camshaft Position Timing- Over-Advanced (Bank 2) Issue Severity: MODERATE– Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible. Diagnosis: This trouble code will not prevent your vehicle from running. However, if left unsolved, this code could …C. CT ESSENCE Discussion starter. 466 posts · Joined 2005. #1 · Jul 26, 2011. Getting Code P0171 (System Too Lean Bank 1) and would like to know the common cause. FYI, also coding P0420 (Catalyst System Efficiency Below Threshold Bank 1). Are these related in any way? Thanks. Reply. ….

Mar 28, 2021 · #Cadillac#ATS#P0171#PCVhoseThis is a 2015 Cadillac ATS luxury 2.0L. P0171 code was cause by vacuum leaking at PCV hose. P0171 P0299 and P288C Codes on 2013 ATS 2.0T Hello, two weeks ago I had two codes P0171 and p0299 and they eventually went away. Last night I was driving on the high way when suddenly check engine light, service stabilitrak, and service traction control lights all came on.Cadillac ATS 2013 - 2017 all all LTG LCV All Cadillac CT6 2016 - 2017 all all LTG All Cadillac CTS 2014 - 2017 all all LTG All Chevrolet Camaro 2016 - 2017 all all …NHTSA ID: 10057593 TSB ID: PI1092B General motors 2013-2014 cadillac ats equipped with 2.5l engine(rpo lcv).some vehicles experience a rough idle, felt in seats, when engine operating at high temperature. *lj2013 ATS 2.0t P0171 code. 748 Views 4 Replies 3 Participants Last post by Neitzke88, 5 mo ago Jump to Latest N. ... Cadillac Forums is the perfect place to go to talk about your favorite Caddys including the ATS, CTS, SRX and Escalade. Full Forum Listing. Explore Our Forums.Share. Code P0171 indicates Bank 1 of the engine has a lean fuel mixture. P0174 indicates Bank 2 of the engine has a lean 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 which side of the engine is ...Jul 24, 2021 · What doe ...more ...more P0171 System Too Lean Fix. PCV Hose Replacement 2.0t Cadillac ATS and Chevy Malibu 2013-2020. Diagnosing P0171 System too lean code. How to Remove and Replac... Jun 14, 2019 · P0171 Code. Hi in the past 1000 miles I have had the P0171 check engine light code come on roughly 4/5 times and I erase the code but comes back. It looks like it comes on when sitting at idle for a bit never came on while driving..only in idle. looked up what is may be (maf sensor,02 sensors,vacuum leaks) I cleaned the maf with crc cleaner and ... P0171 cadillac ats 2013, I kept pulling a lean code P0171. I have been chasing and chasing this code. ... ATS Forums - 2013-2019. ... Get the best of Cadillac Forums on our official app., What doe ...more ...more P0171 System Too Lean Fix. PCV Hose Replacement 2.0t Cadillac ATS and Chevy Malibu 2013-2020. Diagnosing P0171 System too lean code. How to Remove and Replac..., OBD code P0171 indicates a serious issue with the fuel/air ratio entering the first cylinder bank on your Cadillac ATS – i.e. the side with the #1 cylinder. This generally means that you've got a leak somewhere that's keeping the engine from getting enough fuel., Nov 15, 2019 · The definitions are as follows: P0171 - Fuel Trim System Lean Bank 1. P00C6 - Fuel and air metering and auxiliary emission controls. P0299 - turbo/super charger underboost. P228C - fuel and air metering and auxiliary emission controls. Reply. Save. rsingl · #5 · Nov 15, 2019. That is an odd set of codes. , 2013 Chevrolet Malibu - Codes P0089, P0014 & P228D The car has 161,000 miles on it and the check engine light came on. OBD codes P0089, P0014 and P228D appear on the reader. Car runs loud and is sluggish., Driveability. 2014 Cadillac ATS Luxury 2.0L (X LTG) 6-spd (6L45) — 1G6AH5RX5E0130229. P0171 — System Too Lean Bank 1. Check Engine Light Is The …, What the P1101 code means. When a P1101 trouble code is stored, it means that the PCM detected a discrepancy with the voltage from the MAF sensor. This problem can be detected while the PCM is running a self diagnostic called a Key On Engine Running (KOER) test. When the voltage from the MAF sensor is greater or lesser than the voltage allowed ..., The P0138 DTC is a generic trouble code that says the oxygen sensor circuit (Bank 1, Sensor 2) is exhibiting higher voltage than normal. The Powertrain Control Module (PCM) detects that the voltage coming from the sensor is higher than what the manufacturer specs illustrate. This heated oxygen sensor is found at the back of the catalytic converter., Aug 26, 2021 · P0171 P0299 and P288C Codes on 2013 ATS 2.0T Hello, two weeks ago I had two codes P0171 and p0299 and they eventually went away. Last night I was driving on the high way when suddenly check engine light, service stabilitrak, and service traction control lights all came on. , ... Cadillac ATS CT6/Chevrolet Camaro. 1.247,34 TL1.247,34TL · RAPIHIDAN 12673868 PCV Pozitif Karter Havalandırma Borusu Cadillac ATS, Malibu 2013-2018, Envision., You Save: $ 20.64 ( 40%) Check the fit. Add to Cart. Fits the following Cadillac ATS Years: 2013-2015 Cadillac ATS | 2 DOOR COUPE, 2 DOOR LUXURY COUPE, 2 DOOR PERFORMANCE COUPE, 3 DOOR PREMIUM COUPE, 4 DOOR LUXURY SEDAN, 4 DOOR PERFORMANCE SEDAN, 4 DOOR PREMIUM SEDAN, 4 DOOR SEDAN | 4 Cyl …, What the P0299 code means. The P0299 code indicates that the Turbo or Supercharger "A" has excessively low output. The ECU looks for a specific range of boost and when the low boost is detected by the ECU, it sets a P0299 code. This code will illuminate a Check Engine Light on the dashboard and may put the vehicle in limp mode., CADILLAC Technical Service Bulletins for P0171 code. 2013 CADILLAC ATS ENGINE (PWS). 2007 CADILLAC SRX ENGINE AND ENGINE COOLING:ENGINE. 2007 CADILLAC SRX ..., Cadillac OBD2 Port Location. The diagnostic port, also known as OBD-II or OBD2 port, on Cadillac vehicles is located under the dashboard on the driver’s side. Look under the dashboard right above …, Y-Renee K. Action Scientist (part time) Totally Awesome (full time) 2013 ATS 6MT 2.0T; Red on Red Cos Red Wunz Go Fasta, First check for exhaust leaks. Exhaust leaks will cause the sensors to read incorrectly. I would try swapping the upstream O2 sensor. I think it is reading too lean. To compensate, the engine computer may be injecting too much fuel. This results in the downstream O2 sensor reading too high and setting the P2097 code., Your car is equipped with a lot of engine sensors that are essential to keeping your vehicle running. The OBD-II code P015b indicates the PCM has detected a delayed response from the bank 1 sensor 1 oxygen (O2) sensor.If your scanner logs this code, the guide below will help you address it., This fault code indicates the Fuel System Monitor has detected an error in the vehicle's Bank 1 fuel trim adjustment program, resulting in an air/fuel mixture ..., P0021 definition: Intake Camshaft Position Timing- Over-Advanced (Bank 2) Issue Severity: MODERATE– Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible. Diagnosis: This trouble code will not prevent your vehicle from running. However, if left unsolved, this code could …, 2013 ATS 2.0 AWD Premium with 70k miles. Christmas eve I was driving from Central Ohio to Central Illinois and 4.5 hours in to the drive, gently accelerating up an on ramp, the dash lit up. Service Stabilitrack, traction control off, reduced engine power, I immediately pulled over and had the car put on a flatbed and taken to the local dealership., GMC Terrain 2010-2017 3.0 LF1+LFW, 3.6 LFX+LLT. An owner may complain of misfire or roughness during a cold start. Also, a P0300 code might be present, or there may be misfire codes limited to one or two cylinders. Looking at the misfire counter on a scan tool, you will see a high rate on typically one cylinder., Mar 28, 2021 · #Cadillac#ATS#P0171#PCVhoseThis is a 2015 Cadillac ATS luxury 2.0L. P0171 code was cause by vacuum leaking at PCV hose. , Symptoms: P0171 + P0174 Cadillac ATS. 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 ATS has codes P0174 and P0171., =====1===== P0171 Raw code: 0171 ECU: Engine control unit Status: Confirmed OBDII: System too lean, bank 1 =====2===== P0711 Raw code: 0711 ECU: 7EA Status: GM failure record OBDII: Transmission fluid temperature (TFT) sensor - range/performance problem General Electrical Failures [0x00] =====3===== P0171 Raw code: 0171 ECU: Engine control unit Status: DTC supported by calibration, Current DTC ..., Your car is equipped with a lot of engine sensors that are essential to keeping your vehicle running. The OBD-II code P015b indicates the PCM has detected a delayed response from the bank 1 sensor 1 oxygen (O2) sensor.If your scanner logs this code, the guide below will help you address it., 2013 Cadillac ATS quick fix mechanic said 680$ to 1000$ to fix said was o2 sensors and acrylic converter and other mechanic said needed to replace all igniti..., Code P0174 Cadillac Tech Notes. 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 ..., A large vacuum leak between the intake manifold and the throttle body causes two leans codes to set on this 2001 Cadillac DeVille., In our 2013 Cadillac ATS parts category, you'll find a variety of different options and pairings. 2013 Cadillac ATS Specifications-2013 Cadillac ATS. Trims2.0T Luxury Collection AWD. 2.0T Luxury Collection RWD. 2.0T Performance Collection AWD. 2.0T Performance Collection RWD., Labor: 1.0. The cost to diagnose the P0711 Cadillac code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour. Search for P0711 Cadillac Questions and Answers: Search here →., P0171 and P0174 occur when the air/fuel mixture on the vehicle gets too lean. They are both thrown when the oxygen sensors detect that there is not enough oxygen in the exhaust. The engine then makes adjustments to compensate and throws these codes, which trigger the service engine soon light. When these codes both appear at the same time, it ..., Received my 2015 ats 2.0t back from cadillac dealership 2 months ago, ... ATS Forums - 2013-2019. ... P0171 Fuel System Lean code on ATS. Jump to Latest Follow 2082 Views 13 Replies 8 Participants Last post by Pete972, 8 mo ago. 1sickats Discussion starter · Jul 3, 2022 (Edited) Add to quote; Share Only ..., When the P0171 code sets, the oxygen sensors are detecting too little oxygen in the exhaust (running "lean") and the control module is adding more fuel than ...