Code $07e8

24 Jan 2018 ... Ben talks about the definition of P0700, the location, what causes this code, and what you need to do to fix.

Code $07e8. Similar other coolant pump codes include P2600, P2601, P2602, and P2603. Related DTC Discussions. Register now to ask a question (free) 2012 Toyota Camry LE Hybrid P261B and P261C Hello. I recently started getting this code for my 2012 Camry Hybrid. At first it was P261B, I replaced the water pump, but then P261C showed up.

Dodge Ram P0700 Definition. A typical transmission control module. The P0700 code in your Dodge Ram is a generic OBD-II code that indicates a malfunction within the transmission control system. This code is not specific to any particular issue but rather points to a general fault in the system. Additionally, the P0700 code usually …

P26C8 and $07E8. Jump to Latest Follow. 8K views 3 replies 2 participants last post by Cutlass Jun 16, 2020. Vava-kurd Discussion starter. 9 posts · Joined 2020. #1 · Jun 15, 2020. Hi guys, Does anybody knows what these trouble codes mean! Check engine light keep coming back on!Codes MaxiDiag Elite Trouble Codes Injector Circuit/Open Cylinder 1 111 $07E8 Injector Circuit/Open Cylinder 3 B0204 $07E8 Injector Circuit/Open Cylinder 4 nector Cig it/ Unem Save ECM, not EMU Customer reply replied 1 year agoFuel Trim Cylinder Balance. P1174 stands for Fuel Trim Cylinder Balance (Bank 1). These codes are set by your Silverado’s engine control unit (ECU) when a difference in the fuel-air mixture between cylinders of Bank 1 or 2 is detected by their respective oxygen sensors. P1175 means the same exact thing as P1174, just for the …What Does the P0128 Code Mean? P0128 is a generic powertrain code that means the engine control module (ECM) detected that the motor hadn’t reached its required operating temperature within the required timeframe set by the manufacturer. This timeframe depends on other facts, such as ambient temperature.P0014 indicates that the camshaft position sensors detected an incorrect camshaft timing on camshaft B on bank 1. In most cases, this means that there is a problem with your variable camshaft timing control, but it can also mean that there is a problem with the camshaft timing. The timing between the camshafts and crankshaft must be correct …

P0430 is a diagnostic trouble code (DTC) for “Catalyst System Efficiency Below Threshold (Bank 2).”. It warns about a problem with the catalytic converter mounted near engine bank 2 (the side of the engine opposite the number one cylinder). A failing catalytic converterbreaks down less pollutants in the exhaust, resulting in lower oxygen ...May 25, 2023 · The E8 and E9 represent different modules or parts of the vehicle from where the codes are retrieved. E8 represents the engine control module while E9 represents the transmission control module. In short: 7E8 means a request code from ECM. 7E9 means a request from TCM. HELP! 2017 Ford Escape P0741 ($07e8) fault code. My code reader is showing the above code. From my research it seems like it is a faulty VVT solenoid valve. The CEL also came on but is not flashing. This happened the other day after driving for about 30 minutes on the hiway at around 70-75mph.The P261B code is related to the engine water pump assembly. The Engine Control Module (ECM) controls the engine water pump assembly by calculating the necessary amount of coolant flow based on engine coolant temperature, engine speed, and vehicle speed information. The DTC will be set when the engine water pump assembly speed is less than 900 ...If your car battery has died, you've been in an accident, or you purchased a used vehicle where the stereo was flashing "Code" you are not alone. Every day hundreds of people searc...Nov 19, 2020 · These 3 control modules allow the scan tool to read data. The fault codes will be in the engine control module, but the 7E8 is letting you know there are codes. You need to select the engine control module to read those codes. The same for 7E9. When you retrieve the codes (if there are any), signal back if you need assistance in the code meaning. The P0700 code indicates a problem with the transmission. It should not be ignored, because there can be serious drivability problems now and in the future. The technician should check for all codes present to accurately diagnose the problem. Possible resolutions include: TCM replacement. Replacing faulty wiring.P0014 indicates that the camshaft position sensors detected an incorrect camshaft timing on camshaft B on bank 1. In most cases, this means that there is a problem with your variable camshaft timing control, but it can also mean that there is a problem with the camshaft timing. The timing between the camshafts and crankshaft must be correct …

Jun 8, 2017 · OBDII scanner interprets the codes and displays the menu. Some scanners can't solve these codes and show the codes instead of the interpretation. Clicking on the code menu will read the OBDII codes (e.g. P0420 or P0455), if any, from that system. Menu Code 7E8 ($7E8): Engine System Menu Code 7E9 ($7E9): Transmission System 1 Mar 2020 ... In this video I have a 2010 Ford Fusion the check engine light on. My code reader revealed the P1450 code. It is a quick and easy fix for ...Apr 22, 2014 · The code is P0100 $07E8 Mass or Volume Air Flow A Circuit. Read full answer. Jan 07, 2020 • Cars & Trucks. 0 helpful. 1 answer. This code means that the car’s computer detected trouble with the EVAP system vent valve’s function. This vent valve is also known as the purge valve. The computer is responsible for monitoring and controlling the purge valve. If the P0446 DTC sets, it could indicate that there’s an electrical failure in the circuit or a mechanical ...

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What Does the P1326 Hyundai Code Mean? The Knock Sensor Detection System (KSDS) detects vibrations indicating the onset of excessive connecting rod bearing wear. It is designed to alert the driver at an early stage of bearing wear before the occurrence of severe engine damage, including engine failure. If vibrations caused by …Similar other coolant pump codes include P2600, P2601, P2602, and P2603. Related DTC Discussions. Register now to ask a question (free) 2012 Toyota Camry LE Hybrid P261B and P261C Hello. I recently started getting this code for my 2012 Camry Hybrid. At first it was P261B, I replaced the water pump, but then P261C showed up.Ask a mechanic online, 24 hours a day here: https://tinyurl.com/24-7-mechanic In this video we'll talk about the 7E8 and 7E9 engine error codes, what they mean and …Whether you’ve moved to a new location and need to know your ZIP code fast or you’re sending a gift or a letter to someone and don’t have have their ZIP code handy, finding this in...The cost to diagnose the P120D 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.

Mar 21, 2024 · The P0420 code indicates that the Engine Control Module (ECM) has identified a decline in the efficiency of the catalytic converter on Bank 1. This could be attributed to a malfunctioning catalyst or potentially be a false alarm triggered by a defective O2 sensor. The engine control module (ECM) uses two O2 sensors, one in front, and one behind ... The first and foremost thing that you need to do to fix the 7e8 engine code is to find the DLC, i.e., the Data Link Connector. The location of DLC will vary based on the model of Chevy that you are using. Connect the code scanner tool to the DLC port: Secondly, connect the code scanner tool with the DLC port of your Chevy.Usually a $07E8 along with the $07E9 CODE is a gas cap issue not placed back correctly or bad as well, just saying. Due to no high pressure in fuel tank the ECU will detect it and an engine warning light will come on. That can result in bad performance and stalling. Only bringing this up since you say problem started soon after leaving gas ...What does the $07e8 and $07e8pd after the OBD2 code mean? Share Add a Comment. Sort by: Best. ... which meet the criteria but the hacker sits on teh target an takes possession of the vehicle and switches fuel and code with person so vehicles run high which is ment to service the autonomous industry of FAA and gas geulation ...2009 2.0 TDI SE 50K Miles. Had brief coil light flash twice, fault code reader shows "Pending" Code P0544/$07E8 Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1. No symptoms other than indication and pending code. Have read that this can lead to DPF clogging and failure so keen to avoid and resolve.If you can access codes from the NOXS-A, then the U029D code is either intermittent or a memory code. If unable to access the NOXS-A, then the U029D code that the other modules are setting is active, and the problem is there now. The most common failure is a circuit fault which causes the loss of power or ground to the nox sensor a.1 Answer. 2012 Pathfinder continues to code P0101 and $07E8 after replacing mass air flow sensor. Seems to be affected by changes in humidity. Posted by David Brustad on Dec 31, 2018.My understanding is that the $07E8 just indicates it's an ECL code.... but it's not an actual code by and of itself. Your reader needs to pull the actual code in order to …One common problem that Mini Cooper drivers may run into is the P0015 engine code, which indicates an issue with the camshaft position timing. This code specifically points to the “B” camshaft position timing being over-retarded for Bank 1. To resolve this issue, you may need to inspect various components, such as the VANOS …Mar 21, 2024 · The P0420 code indicates that the Engine Control Module (ECM) has identified a decline in the efficiency of the catalytic converter on Bank 1. This could be attributed to a malfunctioning catalyst or potentially be a false alarm triggered by a defective O2 sensor. The engine control module (ECM) uses two O2 sensors, one in front, and one behind ...

The code is P0100 $07E8 Mass or Volume Air Flow A Circuit. Read full answer. Jan 07, 2020 • Cars & Trucks. 0 helpful. 1 answer. I plugged in code for 2009 dodge ram 1500...P0306, $07E8 ...can any one help me with this? P0306 is a generic OBD code, the other one is probably brand specific. Check the link below for help with the generic …

P1260 $07E8 code. P2106. 2006 Expedition 5.4. Yes- new throttle body motor put on and reset goes into limp mode at 50 - Answered by a verified Ford MechanicCode P1682$07E8. SERVICE TRACTION, ENG PWR REDUCED, SERVICE ESC, the car runs awfully. Jump to Latest Follow 18K views ...If you can access codes from the NOXS-A, then the U029D code is either intermittent or a memory code. If unable to access the NOXS-A, then the U029D code that the other modules are setting is active, and the problem is there now. The most common failure is a circuit fault which causes the loss of power or ground to the nox sensor a.Nissan Pathfinder codes P0101 And $07E8 after MAF sensor was replaced. Mechanic's Assistant: Does the engine stall right after starting? And what about hesitation or jerking during acceleration? Runs fine, just continues to code. Seems somewhat affected by changes in humidity. Mechanic's Assistant: What year is your Pathfinder? 2012Code P1682$07E8. SERVICE TRACTION, ENG PWR REDUCED, SERVICE ESC, the car runs awfully. Jump to Latest Follow 18K views ...Jan 7, 2023 · $07E8 code, I did, changed the purge valve, changed the gas cap, Tried to clear the code, it still popped up 2007 5.4 L, - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. When a code P219A is stored, it means that the powertrain control module (PCM) has detected an air to fuel ratio imbalance for the bank of the engine which contains the number one cylinder. In order to monitor the air to fuel ratio for each engine bank, the PCM uses data input from heated exhaust oxygen sensors (sometimes called air fuel sensors).

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P0138 is a common OBDII code that occurs in many vehicles, including the Kia Sedona. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself. There are also some less likely problems that can cause …#1 · Apr 4, 2022. My CEL came on this weekend on my 2010 E70 and I got to use my Foxwell for the first time and got $07E8 and $07EC error codes. I searched this forum …P0441 is an EVAP control system powertrain diagnostic trouble code. It is only set on vehicles that can ‘monitor’ if the ‘purge flow’ is correct or not. Most all with a few exceptions are equipped with either a Purge Flow Sensor or Leak Detection Pump. This code indicates the EVAP control system is not functioning correctly.The P0013 code stands for “Exhaust “B” Camshaft Position Actuator Circuit/Open (Bank 1).” Some issues that may trigger the code include a bad oil control valve, problems with the VVT solenoid control circuit, and issues with the PCM. Symptoms to look out for include ignition issues, poor mileage, and rough running.Drivetrain malfunction module $07e8 and $07e9 along with code p054b. P054b and no i have not. 2013 528i xdrive. Was - Answered by a verified BMW Mechanic2.0L. 4 CYL. 2WD. AUTOMATIC. 168,000 MILES. OBD2 Codes $07E8 and $07E9 are coming up on my car I purchased the OBD2 scanner on eBay and wanted to know why my check engine light was on, just wondering what these codes might mean. Wednesday, May 17th, 2023 AT 2:42 PM.P24A0 FORD code possible causes. Perform the Diesel Particulate Filter Service Regeneration. Faulty Exhaust Gas Temperature Sensor. Exhaust Gas Temperature Sensor harness is open or shorted. Exhaust Gas Temperature Sensor circuit poor electrical connection. Faulty Exhaust Particulate Filter. Read more: P24a0 Ford Code - Closed …Jul 27, 2023 · Thank you. Answered in 4 minutes by: Subaru Mechanic: Mike Alberghini. Hello! P0420 is referring t the exhaust system. it could be something like an exhaust leak, bad oxygen sensor, or bad catalytic converter. The other 2 codes are not real codes, and are due to your scan tool not knowing how to read the codes given to it by the computer. Hi, I have a 2007 Caliber. My check engine (MFI) light has been on for a while. My CEN-TECH code reader shows: P006 $07E8 Intake Manifold Runner Control StuckClicking on the code menu will read the OBDII codes (e.g. P0420 or P0455), if any, from that system. Menu Code 7E8 ($7E8): Engine System. Menu Code 7E9 ($7E9): Transmission System. Menu Code 7EA ($7EA): Engine Management. +1 vote. answered Aug 8, 2018 by Reynaldo (13.3k points) 2010 Volkswagen Jetta 2.0L Turbo.The 07e8 code in Ford vehicles refers to a Diagnostic Trouble Code (DTC) that indicates a potential issue with the vehicle’s engine, transmission, or emissions system. This code is specific to Ford vehicles and is part of the OBD-II (On-Board Diagnostics II) system.Aug 27, 2021 · Code P1682$07E8. SERVICE TRACTION, ENG PWR REDUCED, SERVICE ESC, the car runs awfully. Jump to Latest Follow 18K views ... ….

What Does Code P2177 Mean? OBD II fault code P2177 is a generic code that is defined as “System Too Lean Off Idle Bank 1”, and is set when the PCM (Powertrain Control Module) detects that there is too much air relative to fuel in the air/fuel mixture on Bank 1. Note that “Bank 1” refers to the bank of cylinders that contains …#1 · Apr 16, 2023. Vehicle Details: 2014 2.5L. Transmission: TR580. I've got a new error & I'm having trouble verifying what the codes are telling me. There are apparently 2 …Curious how to create a website with HTML and CSS? You're in the right place! This step-by-step tutorial teaches you to code your own website from scratch. Learn to Build a Website...Mar 24, 2019 · Codes $7E8, $7E9 and P1326? - 2013 Kia Optima SXL, Check engine light came and started flashing. ... J’ai c’es Code $07E8 et$0E9 sur mon ram c’est quoi parce ... P0012 is a generic powertrain code. It indicates the engine control module (ECM) has noticed that the timing of the intake camshaft for bank 1 is different from what it should be. The ECM is responsible for determining where this timing should be and it sends an alert whenever it is falling behind. This timing issue happens during either the ...Jun 12, 2017 · They found a P0441 code and said it pertained to RRT 17-015 (IM Purge Port Excess Flash Matl). They performed a repair and every thing was fine, no lights or performance issues. Today I was working on an older Dakota 5,2L and had the OBD tool out. I hooked it up to the Rubicon and found two stored codes in my system ($7E8 and $7E9). What Does Code P2177 Mean? OBD II fault code P2177 is a generic code that is defined as “System Too Lean Off Idle Bank 1”, and is set when the PCM (Powertrain Control Module) detects that there is too much air relative to fuel in the air/fuel mixture on Bank 1. Note that “Bank 1” refers to the bank of cylinders that contains …Engine Codes $07E8 and $7E8: More Than Just Numbers. Contrary to initial impressions, the codes $07E8 and $7E8 are not direct indicators of specific engine faults. Instead, they point to submenus within the diagnostic system of the vehicle, specifically relating to the engine and transmission control modules.P0300 is a diagnostic trouble code (DTC) for "Random/Multiple Cylinder Misfire Detected". 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 .The code is P0100 $07E8 Mass or Volume Air Flow A Circuit. Read full answer. Jan 07, 2020 • Cars & Trucks. 0 helpful. 1 answer. Code $07e8, The P0420 code sets if the computer sees too much fluctuation in the signal from the downstream oxygen sensor. While you're driving the computer tests the catalytic converter by enriching the air to fuel mixture slightly. Then the computer looks to make sure the signal from the downstream oxygen sensor stays pretty much a flatline., IKEA is a popular home decor and furniture retailer that offers affordable and stylish products. If you’re looking to shop at IKEA online, you might be wondering how to get the bes..., Apr 4, 2022 · My CEL came on this weekend on my 2010 E70 and I got to use my Foxwell for the first time and got $07E8 and $07EC error codes. I searched this forum and Google and got almost nothing. I tried to clear the CEL and it won't clear. What do I need to do other than take it to a shop? Thanks! , If you’re ready to try your hand at coding, you’re in luck, because there is no shortage of online classes and resources available. Read on to discover some of the easiest ways to ..., Common Trouble Codes Related to $7E8. As mentioned above, $7E8 is a designation used to describe a vehicle’s engine control module. Therefore, this menu will be selected when attempting to access engine related faults. The following are several faults most commonly stored by this module. P0300 – P0305: Cylinder misfire., Code 7E8 shows up when there is something wrong with the emission system, particularly the loss of air pressure in the evaporative emission control system. What Does Code 7E8 Mean? This 7E8 engine …, The P0420 code sets if the computer sees too much fluctuation in the signal from the downstream oxygen sensor. While you're driving the computer tests the catalytic converter by enriching the air to fuel mixture slightly. Then the computer looks to make sure the signal from the downstream oxygen sensor stays pretty much a flatline., On my '08 Patriot, I am getting a check engine code: P2004 Intake Manifold Runner Control Stuck Open. Is there a way to tell if it is just a valve vs. the actuator ($90) vs. the whole manifold ($260)? My gas-mileage has decreased, low-end performance has dropped and the engine seems louder., They found a P0441 code and said it pertained to RRT 17-015 (IM Purge Port Excess Flash Matl). They performed a repair and every thing was fine, no lights or performance issues. Today I was working on an older Dakota 5,2L and had the OBD tool out. I hooked it up to the Rubicon and found two stored codes in my system ($7E8 and $7E9)., They are generic codes that are used by some scan tools or code readers to indicate that there are additional codes stored in the vehicle's Engine Control Module (ECM). The $7E8 code typically refers to the engine, while the $7E9 code refers to the transmission. These are CAN codes so you have a PCM or BCM that is not working but I have seen ... , Aug 27, 2022 · HELP! 2017 Ford Escape P0741 ($07e8) fault code. My code reader is showing the above code. From my research it seems like it is a faulty VVT solenoid valve. The CEL also came on but is not flashing. This happened the other day after driving for about 30 minutes on the hiway at around 70-75mph. , OBDII scanner interprets the codes and displays the menu. Some scanners can't solve these codes and show the codes instead of the interpretation. Clicking on the code menu will read the OBDII codes (e.g. P0420 or P0455), if any, from that system. Menu Code 7E8 ($7E8): Engine System Menu Code 7E9 ($7E9): Transmission System, We've got an exclusive Square promo code for hardware. Use code PTMSquare for 20% off your first hardware purchase. For new customers only. Part-Time Money® Make extra money in you..., Usually a $07E8 along with the $07E9 CODE is a gas cap issue not placed back correctly or bad as well, just saying. Due to no high pressure in fuel tank the ECU will detect it and an engine warning light will come on. That can result in bad performance and stalling., In some Cases the Issue can only be resolved by Replacing the whole Intake Manifold. The Intake Manifold Flap Motor (V157) and Intake Manifold Flap Potentiometer (G336) may be Part of the same Unit. When found in a VW Golf/Jetta (1K): 1.9l PD-TDI (BRM), check Engine Control Module (ECM) Software Version: 03G-906-016-AB @ 7328 or 7550 as well as ..., This particular code indicates a range or performance malfunction within the Turbo/Supercharger Inlet Pressure Sensor (TCIP) circuit. The turbo/supercharger are responsible for increasing "volumetric efficiency" (amount of air) within the combustion chamber by creating pressure within the intake system. Generally speaking Turbochargers are ..., Already replaced 02…. 2012 Acadia throwing P219A $07E8 code. Already replaced 02 sensors. Answered in 4 minutes by: Chris (aka-Moose) Chris (aka-Moose) Category: GMC. Satisfied Customers: 84,069. Experience: 24 years of experience diagnosing & repairing., The P1450 code is also caused when the fuel filler cap cannot vent properly. A stuck open fuel filler cap valve, a kinked or plugged fuel filler hose, or a blocked charcoal canister can cause it. If the fuel filler cap is stuck, it can prevent the excessive fuel tank vacuum relief from happening, which will cause the P1450 code., If the ECU determines the signal from the fuel pressure sensor is too high, it will trigger a P0193 trouble code. This can be caused by a faulty fuel rail pressure sensor, wiring issues, or an actually too high fuel pressure. P0190 OBD-II Trouble Code: Fuel Rail Pressure Sensor Circuit Malfunction. Categories: OBD Codes., Whether you’ve moved to a new location and need to know your ZIP code fast or you’re sending a gift or a letter to someone and don’t have have their ZIP code handy, finding this in..., Well take Ignition coil from 5 and move it to 6. Then start up the car and put it back on the scanner. This time around it should read the code ie, P306 and P301. Now if that happens it is surely the Ignition coils. They are an easy fix and the LIKELY problem. The additional code "P07E8" probably is related to the other two codes., Apr 4, 2022 · My CEL came on this weekend on my 2010 E70 and I got to use my Foxwell for the first time and got $07E8 and $07EC error codes. I searched this forum and Google and got almost nothing. I tried to clear the CEL and it won't clear. What do I need to do other than take it to a shop? Thanks! , Subaru Mechanic: Mike Alberghini. Hello! P0420 is referring t the exhaust system. it could be something like an exhaust leak, bad oxygen sensor, or bad catalytic converter. The other 2 codes are not real codes, and are due to your scan tool not knowing how to read the codes given to it by the computer., P0012 is a generic powertrain code. It indicates the engine control module (ECM) has noticed that the timing of the intake camshaft for bank 1 is different from what it should be. The ECM is responsible for determining where this timing should be and it sends an alert whenever it is falling behind. This timing issue happens during either the ..., P0012 2020 Ford F150 📷. P0012 2006 Ford Fusion 📷. P0012 2007 Ford Fusion 📷. P0012 2008 Ford Fusion 📷. P0012 2009 Ford Fusion 📷. P0012 2010 Ford Fusion 📷. P0012 2011 Ford Fusion 📷. P0012 2012 Ford Fusion 📷. How to repair P0012 Ford code 'A' Camshaft Position Timing Over-Retarded Bank 1., P0430 is a diagnostic trouble code (DTC) for “Catalyst System Efficiency Below Threshold (Bank 2).”. It warns about a problem with the catalytic converter mounted near engine bank 2 (the side of the engine opposite the number one cylinder). A failing catalytic converterbreaks down less pollutants in the exhaust, resulting in lower oxygen ..., In the case of error code 7E8, this typically indicates a problem with the ECM itself – although it could also be indicative of a problem with one or more of the sensors or components that the ECM relies on. Possible Causes of Error Code 7E8. There are a number of different things that could trigger error code 7E8. Some of the most common include:, #1 · Jun 12, 2017. 2017 Rubicon Unlimited Hard Rock with automatic and 3,800 miles. Took it in a week ago when the “check engine” light popped on. They found a P0441 code and …, A code of conduct is necessary so members of an organization or group understand the standards they will be expected to uphold when interacting with each other and others outside t..., It has just under 70,000 miles and the car today displayed engine light with the trouble code P0068$07E8. MAP/MAF throttle position correlation. I've had the valve cover gasket and breather hose replaced earlier this year when I had a different trouble code P006800 Passive/Sporadic MAP/MAF - throttle position correlation., The codes should clear off by now. Also, endeavor to perform an EVAP test on your car after driving for 10,000 to prevent poor gas mileage and the $7e8 engine code. You can take your car to a professional mechanic if the engine code persists after initiating any of the above fixes. $7e8 and $7e9 Engine Code, Jul 27, 2023 · Thank you. Answered in 4 minutes by: Subaru Mechanic: Mike Alberghini. Hello! P0420 is referring t the exhaust system. it could be something like an exhaust leak, bad oxygen sensor, or bad catalytic converter. The other 2 codes are not real codes, and are due to your scan tool not knowing how to read the codes given to it by the computer. , 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.