Is 7e8 engine code bad

Being a Focus with a no start chances are you need a new TCM (trans control module). WHen the key is in the ignition look at the PRNDL in the message center. The selected gear should be highlighted with a box around the letter. If you have no square the car doesn't know what gear it's in. If it's a TCM, the part is about $450.

Maskinen kan berövas bränsle, vilket resulterar i koden 7E8 -motorn . Detta skapar också en dålig bränsleekonomi eftersom mycket av det går förlorat på grund av avgasläckor. Skadad kapsel nära ventil eller bränslebehållsventil. Din bilbränslebanare är fylld med kol för att fånga ångan som flyr in i atmosfären.The 7e8 engine code is one of the most common codes, meaning that it can be caused by many things. Some possibilities are: A bad throttle position sensor (TPS). The TPS sends information to the engine computer so that it knows how much air is entering your car's cylinders. If this part fails, it will cause a 7e8 engine code to appear on your car's dashboard or in its data log. A broken wiring ...Esto también puede activar el código 7E8. Válvula solenoide de control de presión/purga defectuosa. Su válvula solenoide de control de purga es el principal responsable de regular las emisiones de su vehículo. Los vapores de combustible capturados se almacenan en el bote de carbón antes de ser devueltos a la máquina.Step 4: Access the Codes. Locate the codes menu and press the “Scan” button. If the 7E8 7EA engine code appears, use the button indicated “Scroll” to select it. After scrolling to this engine code, press the “OK” or “ENTER” button. The buttons have varying symbols depending on the type of scan tool used. FAQs about 7E8 Engine Code Is the 7e8 engine code bad? From my experience and expertise, the 7E8 engine code signals a potential issue with the vehicle’s emission system. Specifically, this code points to a loss of air pressure in the evaporative emission system, a possible malfunction with the engine control module (ECM), or compromised fuel ... 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

The check engine light comes on the traction light came on (the one that comes on when you loose traction) I limp home and attach my scanner and i get code P1682$07E8 I try to erase the code but it is still there and the engine is still running very rough. i tried erasing the code with a/c on and off and that made no difference.Shop Car Code Reader Now. Understanding the 7E8 Engine Code. The 7E8 engine code isn't a fault code in itself. Instead, it's a command code that your vehicle's OBD-II scanner displays, indicating that there's an issue that needs further investigation. The actual problem could range from a minor sensor malfunction to more significant engine ...The 7E8 and 7E9 engine codes are generic codes that can be used by any vehicle manufacturer. The 7E8 code refers to the ECM, while the 7E9 code refers to the Transmission Control Module (TCM). These codes can be read using an OBD-II scanner, which can be plugged into your car’s diagnostic port.A bad PCM, or power train control module, has a check engine light that does not turn off, an assortment of random codes, intermediate stalling issues and poor engine performance. ...Our trouble codes start with a "P". Example P0401. If you can get me the "P" trouble codes, it would be more helpful. The "P" codes are more descriptive to help isolating what is wrong. Ask Your Own Ford Question. 2005 Ford Freestyle AAA guy mechanic I assume told them it had a crack in I'm hoping just the exhaust pipe and not the exhaust ...Navigate to a heading called "Read Codes" and select it. Step 4: Record the codes that display. If there are multiple codes, they may cycle through or you may have to press a button to view the next code. Tip: It is very important to write these codes down in the same order as displayed on the scanner.

Unfortunately for You, the $7E8 and $7E9 engine codes mean bad news! No, just kidding -- they can mean literally anything. When the OBD-II tool that You're using can't read and translate the fault code data into hexadecimal format, it uses sort of "placeholder" codes. Your $7E8 code does indeed indicate that there's a fault with the …I have a 2013 Mitsubishi Outlander engine code $7E8:Engine, is P0420 which is the catalyst System efficiency below threshold bank, but what is the code $7E9:A/T ? SERVICE ENGINE SOON, is on in my vehicle. The OBD-Codes show 2 issues $7E8:Engine, and $7E9:A/T.Jul 30, 2020 · Repair costs associated with replacing a bad MAF sensor, average $230-280 in parts and labor, while a damaged oil pan can run anywhere from $570-630 in parts and labor. To properly diagnose the 7E8 code, visit a reliable service center. These are not trouble codes, instead they direct you to components that need to be looked at. Basically, the control module menus and both codes represent something. The 7e8 represents the engine powertrain, while the 7e9 represents the transmission powertrain.The 7E8 code will be stored whenever the engine has a problem, and the CEL will illuminate. Poor engine performance - Your vehicle will have a hard time going uphill, especially when under load. This happens because the air-fuel ratio in the combustion chambers can be overly rich or too lean.

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To attach a file to your post, you need to be using the main 'New Post' or 'New Thread' page and not 'Quick Reply'. To use the main 'New Post' page, click the 'Post Reply' button in the relevant thread.Toyota Master 29,490 Answers. Posted on Nov 03, 2017. Means your not using your scan tool correctly hit --read owners manual for your scanner and rescan when the $7e8 pops up you should be either tapping enter --scroll or arrow up or down for the code. ian mcfie. Expert 147 Answers. Posted on Nov 03, 2017. 7E8 and 7E9 these are not codes what ...The codes are a menu of systems that the OBDII scanner can access. 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 SystemCommon problems that can trigger this code include bad purge valves, problems with the purge valve circuit, and issues with the PCM. ... In many cases, the only symptom that would accompany the trouble code P0443 is an illuminated check engine light. However, you may observe other telltale signs, particularly if there are other codes stored in ...An engine code is also referred to as a Diagnostic Trouble Code, or DTC. Wrangler DTC codes can range from low battery voltage to sensor issues, depicted by a string of digits. How to Check An Engine Code. For JK Wranglers, checking the engine code is a relatively simple task. Just complete the following steps: Insert key into the ignition.I have a 2019 Tacoma with 68K. Check engine light is on with code 7E9:A/T. Dealer can't get me in for over 3 weeks. Has anyone had this and is it still...

Code 7E8 denotes a fuel or air intake problem resulting in a loss of airflow for the vehicle’s evaporative emissions management system. The transmission control system problem code 7E9 might result in a reduction in transmission efficiency. Emission codes 7E8 and 7E9 are connected to a broken throttle position sensor.3 posts · Joined 2012. #1 · Jul 8, 2012 (Edited) I'm getting a Check Engine Light, P0430 Code randomly in my 2007 Tundra, Double Cab, 4.7 Liter V-8. There's approximately 150K miles n the exhaust system. The engine has only 120K because the dealer blew up my original engine during service and had to replace it at dealer expense.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 …To attach a file to your post, you need to be using the main 'New Post' or 'New Thread' page and not 'Quick Reply'. To use the main 'New Post' page, click the 'Post Reply' button in the relevant thread.What could it mean Code 7e8 is a trouble engine code, and it indicates that there is an issue found with detecting the body control module. If the module is failing, it will need to be replaced. Replacing this part can cost You between $120 and $185 for just the module. If You choose to have it replaced professionally by a mechanic or by an ...Chevy Mechanic: Pete. If the check engine light is on, then the engine computer has detected a fault with one of the vehicles engine or transmission or emission components, there is an issue with the vehicle. But you will have to have the codes re checked using a fully compatible scan tool that can read the computer properly as code $7EA is not ...7E8: Engine and 7E9:A/T code. Hey folks, new to Mazda's since my old B210. Just picked up a 2010 3 Hatchback with 2.5 engine. My son was driving it and it showed the AT lights and light with car and I assume was traction control symbol. I read the codes and got 7E8: Engine and 7E9:A/T code. Not much info in the web about this.That is what they call a "generic" code. Some OBD11 or OBD2, "same thing", scanners will give a $7E8 and $7EA. together and maybe a $7E9. These are for a sub menu. Click on each one separately and you should or might get a regular "P0" code if your scanner. has the supported module. If not either get a better scanner or. should be able …Check engine light codes. Im runnin a 2010 Colarado with about 90,000 miles on her. My check engine light popped on, and im getting the following codes: $7EB, $7E8, and $7EA. Not sure what these codes are, but I eventually found the DTC code P0442 on my reader. I was able to clear the codes, and the engine light hasnt popped back on yet.This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.

So in summary, the 7E8 code essentially means there is a wiring fault or electrical connection issue that is disrupting communication between the ECM …

i thought bad gas, so I put in 10 gallons of shell nitro plus premium (I always use shell regular). No change so I dump in a bottle of Heet water fuel remover and a bottle of Techron. I was thinking water in gas or fouled injector. no change, go back to o’reillys use their scan tool. I get 2 codes $7E8 engine code P0302 cylinder 2 misfire.Examination Of Oxygen Sensors: The 7E8 code can be caused by defective oxygen sensors. These sensors keep an eye on your engine's air-fuel ratio. If they're poor, they could need to be replaced. To find the malfunctioning sensor, talk to a mechanic or the owner's manual for your car. 3.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 SystemThe truth is, the 7E8 engine code is not necessarily bad on its own. It is simply a generic code that indicates a problem with the engine. To determine the severity of the issue, it …Posted on Apr 27, 2012. $7E8 and $7E9 are sub menus for the Engine and Transmission. You need to select one and press enter. It will then give you the code for that sub menu. David Hernandez. Contributor 1 Answer. Posted on Dec 31, 2015.The 7E8, also $7E8 is a sub-menu in the OBD scan tool where you will get fault codes for the engine control module; those are the P0000 codes. 7E9 ($7E9) - Transmission Control Module (TCM) 7E9 and $7E9 sub-menus in your scan tool will open fault codes for the transmission control module, which are also P0000, so you will be able to ...The 7E8 engine code related to the Emission Control System of Hyundai cars can be because of a busted fuse, too. This could be due to numerous reasons, such as an electrical short-circuit or high voltage spike. A visual inspection of the fuses should be done first before running any tests with diagnostic tools.11 posts · Joined 2010. #6 · Feb 18, 2012. Thanks for the replies... I had a check engine light, and the guy used the OBDII scanner and the two codes he pulled up were the "7E8: Engine" and "7EA"... he didn't know what it was either. I've looked online with no luck, so not sure what to do.7e8 on 2009 ford fusion I have a 7e8 and 7e8 code on my vehicle but every thing seem to be running well. I - Ford 2009 Fusion question ... SOURCE: '07 Tahoe; check engine light on steady. Just came. Have a dealer or garage check your Oxygen (O2) sensor. As a quick fix, try disconnecting and reconnecting your car battery. ... from bad ignition ...

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Mercedes 2010 ml350 fault codes 7e8 and 7e9. Posted by bob Frishman on Mar 01, 2018. ... my 1995 mercedes s420 stalling after a few miles so i changed cam sensor on front of engine ,didnt find another sensor i thought there were 2 changed 1 but still does the same but stays on longer is there a fuse that goes with out with sensor.The ECM indicates the stored fault code by flashing the malfunction indicator/check engine lamp. Fault codes 1 through 9 are indicated by individual short blinks and fault codes 10 and above are indicated by long and short blinks. One long blink is equivalent to 10 short blinks. The fault code can be determined by adding the long and short blinks.Navigate to a heading called "Read Codes" and select it. Step 4: Record the codes that display. If there are multiple codes, they may cycle through or you may have to press a button to view the next code. Tip: It is very important to write these codes down in the same order as displayed on the scanner.7E8 engine code appears when the engine control module of a car does not function at the optimized level. It indicates the defects of the intake manifold, emission system, and fuel passages. It shows the poor performance of fuel lines, clogging, and PCM malfunctioning. Also, one of the primary signs of 7E8 is excessive motor idling and vibrations.Need Help? Ask a mechanic online, 24 hours a day here: https://tinyurl.com/24-7-mechanicIn this video we'll talk about the 7E8 and 7E9 engine error codes, wh...C1201 Toyota Code – Engine Control System Malfunction. P1000 – OBDII Monitor Testing Not Complete. P1101 Chevy Cruze: Meaning, Causes & Fixes. P1131 Code – Meaning, Causes, Symptoms (& How To Fix) P1299 Code – Meaning, Causes, Symptoms (& How To Fix) P1326 Code – Meaning, Causes, Symptoms (& How To Fix)B0026 GMC 17,557 Views. Driver Frontal Deployment Loop Single Stage or Stage 1 Open. B0028 GMC 3,028 Views. Passenger Side Deployment Loop Resistance Low. B0029 GMC 11,131 Views. Right Front/Passenger Side Deployment Loop Open. 1 of 613 Next. Description, Diagnostic and Repair Information for GMC OBD2-OBDII Engine Codes | Page 1 | Engine-Codes.com.$7E8 Engine and $7E9 A/T codes are showing up. Car won't start. Not corroded. Lights come on in the cab. 2014. I only - Answered by a verified Auto MechanicThe 7E8 engine code is a common topic of discussion among car enthusiasts and mechanics.Many people wonder if this engine code is bad and what it means for their vehicle.The truth is, the 7E8 engine code is not necessarily bad on its own. It is simply a generic code that indicates a problem with the engine. To determine the severity of the issue, it is important to look at the accompanying ...Shop Car Code Reader Now. Understanding the 7E8 Engine Code. The 7E8 engine code isn't a fault code in itself. Instead, it's a command code that your vehicle's OBD-II scanner displays, indicating that there's an issue that needs further investigation. The actual problem could range from a minor sensor malfunction to more significant engine ... ….

Engine code $7E8: engine $7E9: A/T any idea what these are. $7E8 and $7E9 are sub menus for the Engine and Transmission. ... 1 answer. What is a P0339 code for a 2005 Dodge Durango. crankshaft position sensor A CKT intermttent, this problem code means=== p0339--crankshaft sensor bad or a loose wire. have a good day!! Read full answer. Oct 29 ...7E8 engine code. 7E8 engine code represents the car's engine data stream and indicates 'air pressure' loss for the evaporative emission control system. Usually, the 7E8 code implies an engine powertrain; 7E9 Implies the transmission powertrain. Possible causes see the 7E8 code are: Leaking, disconnected, or plugged fuel vapor linesCheck engine light codes. Im runnin a 2010 Colarado with about 90,000 miles on her. My check engine light popped on, and im getting the following codes: $7EB, $7E8, and $7EA. Not sure what these codes are, but I eventually found the DTC code P0442 on my reader. I was able to clear the codes, and the engine light hasnt popped …In conclusion, the 7e8 engine code found in the Jeep Grand Cherokee is a complex diagnostic tool that can provide valuable information about potential issues within the vehicle's engine system. By using the Popular Mechanics Magazine as a resource, car enthusiasts and mechanics alike can stay informed on the latest advancements in technology ...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.Engine code 7E8. Engine code 7E8 is not an engine code but a submenu for the engine control module. If your OBD scan tool displays engine code 7E8, there is a request code from the engine control module (ECM). ... The most common signs of bad spark plug wires include poor engine performance, bad fuel economy, and rough idle. The good news is ...First, the vent valve in the evaporative emissions system might be faulty. Second, the connection, wires, or circuits in the system might be having a connectivity issue that is causing a false reading. Last, the powertrain control module, engine management computer, or engine control module might be faulty, which again, is creating a false ...Chevy Mechanic: Greg. 7E8 this is not code but a menu for the engine. 7E9 and this is for the transmission. Depending on the scan tool all you need to is click on the 7E8 and it will take you to the engine data as with the 7E9 transmission. Then you can get the PXXXX code witch you need to have for a good repair.code Tea, 7eb, 7e8, engine Light for a 2010 Chevy ... from Houston Texas to Gray Louisiana with no problem but on Tuesday or Wednesday I was driving it around and got these codes and the truck started running bad but after about a minute or two the check engine light went off and the truck started running fine but today it happened ... Is 7e8 engine code bad, $7E8 and the $7E9 are fuel/ air intake codes, as for the P1326 Ok, this code is set when the knock sensor detects vibrations from engine rod knock, however, it may be set falsely due to incorrect knock sensor logic programming in the engine control module., The 7E8 and 7E9 engine codes can be a trouble some code. It is common in Hyundai, Toyota, Honda, and other modeern cars.This codes in cars can be triggered b..., According to Popular Mechanics Magazine, the 7e8 and 7e9 engine codes in Hyundai vehicles have been associated with various problems and known issues. These codes often indicate issues related to the engine’s fuel system, such as fuel pressure or injector problems. It is recommended to have the vehicle diagnosed by a qualified …, Focus. If You're getting a engine code 7E8 on Your Ford Focus, that's going to intake there's an issue with the fuel/air intake combo. This will often be paired with a code P1326, which is a code for the Engine Fuel and Air Metering Throttle/Pedal Position Sensor. While You should look at that sensor first, often times this code is going to be ..., The 7e8 and 7e9 engine codes can be triggered by various factors. Some common causes include faulty oxygen sensors, issues with the fuel system, vacuum leaks, malfunctioning catalytic converters, and problems with the ignition system. It is essential to diagnose the specific cause accurately to address the underlying issue effectively., Una herramienta de exploración OBD-II debe mostrar el motor del código 7E8 en esta situación. MPG bajo (kilometraje por galón) o rendimiento reducido también son síntomas de este problema. Notará una disminución en la energía porque el automóvil está bajo carga y el tacómetro comienza a subir. Esto se debe a una relación aérea ..., Chevy Mechanic: Pete. If the check engine light is on, then the engine computer has detected a fault with one of the vehicles engine or transmission or emission components, there is an issue with the vehicle. But you will have to have the codes re checked using a fully compatible scan tool that can read the computer properly as code $7EA is not ..., 11 posts · Joined 2010. #6 · Feb 18, 2012. Thanks for the replies... I had a check engine light, and the guy used the OBDII scanner and the two codes he pulled up were the "7E8: Engine" and "7EA"... he didn't know what it was either. I've looked online with no luck, so not sure what to do., Posted on Apr 27, 2012. $7E8 and $7E9 are sub menus for the Engine and Transmission. You need to select one and press enter. It will then give you the code for that sub menu. David Hernandez. Contributor 1 Answer. Posted on Dec 31, 2015., Hi! My check engine light turned on today and keeps blinking, we got code 07e8 and 07e9, and the throttle response is sluggish. Its a 2016 Kia Sorento 2,2 diesel engine with automatic transmission. Re … read more, Consider the following as possible fixes to the 7e8 engine code: Repair leaking, disconnected, or plug any unplugged fuel vapor lines. Replace missing or damaged fuel filler caps. Repair damaged fuel filler pipe. Repair or replace faulty fuel canister or close valve. Replace faulty fuel tank pressure sensor., The 7E8 engine code is a common topic of discussion among car enthusiasts and mechanics. Many people wonder if this engine code is bad and what it means for their vehicle. The truth is, the 7E8 engine code is not necessarily bad on its own. It is simply a generic code that indicates a problem with the engine. , Police and fire departments across the U.S. are eliminating jargon like '10-4' in favor of every-day vernacular. HowStuffWorks explains why. Advertisement It was April 1928, and a ..., Researchers at Stanford find that code-generating AI systems can cause developers to overlook security vulnerabilities in apps. A recent study finds that software engineers who use..., Again, $7e8 & $7e9 are not engine codes. Web that’s because 7e8 isn’t an engine trouble code. Web the 7e8 engine code may seem like an enigmatic set of characters to the uninitiated, but it becomes easier to grasp with some background knowledge. Let’s Discuss What The 7E8. Web is it safe to drive my car with the 7e8 …, 7E8 and $7E9 are sub-menus for the Engine and Transmission. You need to select one and press enter. You need to select one and press enter. It will then give you the code for that submenu. the code will be 4 digits and start with either a P,B,C,or U, The truth is, the 7E8 engine code is not necessarily bad on its own. It is simply a generic code that indicates a problem with the engine. To determine the severity of the issue, it is important to look at the accompanying code that follows the 7E8. This additional code will provide more specific information about the problem, Is 7e8 engine code on Chevy bad? No, Chevy's engine code 7e8 isn't a bad thing. Because if your Check Engine light is on and your code scanner reads 7e8, it implies your Chevy needs to be serviced as soon as possible in order to detect all of its existing issues. Only then can the problem be easily fixed., Engine light on. Don't have power taking off. Reply 1: Good evening, We need the code in the format of a P and 4 numbers. That will help us..., Those are not fault codes. 7E8 is a hex code that means Engine and 7E9 is a hex code that means Transmission. These are just coding in the scan tool software. You need to go further into the scan to get the fault codes which for an Audi will either be a Pxxxx code such as P0730, or a 5 digit fault code such a 01352, I believe it might be a bad intercooler charge tube since there are cracks in the tube. 7E8 And 7E9 Engine Code ... I have $7e9:a/t and 7e8:engine codes with check engine light on. Also po270. The e350 diesel is not making power sometimes and I have to lift my foot off the accelerator to get it to shift and we are ..., Mar 20, 2024 · $7e8 and $7e9 Engine Code. Even though the two engine codes seem to relate to the engine control module, they differ. The $7e8 engine code indicates a problem with the engine powertrain; meanwhile, the $7e9 suggests a problem with the transmission powertrain. As an Amazon Service LLC Program Associate, V. Auto Basics earns from qualifying ... , This is my first post here. I have a 2006 Durango with 60K miles. I want to correct my check engine light problem. Yes, I have changed the gas cap. The codes tat keep coming up are 7E8 and 7E9. It just seems that all the place I have brought it to want to clear the code and send me on my way. The vehicle runs fine., SOURCE: auto scanner code 1698 The P1698 code means that no digital data is being received by the powertrain controller from the transmission control module, located on the right inner fender. The manual says to check the CCD bus wires between the module and the rest of the system using the Chrysler diagnostic readout box. But if you don't have one then I think you can do the same thing by ..., This code triggers when the camshaft on bank 2 of the engine isn't working in conjunction with the crankshaft. The code can trigger because of a failed camshaft variable timing solenoid, low engine oil levels, incorrect oil usage, failed variable valve timing actuator, or a worn timing chain, among other issues., Let's dive into what the 7E8 engine code means and how you can tackle it. Symptoms of the 7E8 Engine Code. The 7E8 engine code might not always come with noticeable symptoms, making it tricky for drivers to identify there's an issue. However, some common signs can include: Check Engine Light: The most obvious indicator that there might be a ... , The 7E8 and 7E9 engine codes indicate a problem with the engine or emissions system and can be triggered by various issues. Symptoms include rough idling,, 4. 47770. 106 posts · Joined 2013. #6 · Jul 30, 2017 (Edited) Filled up my 2014 JGC diesel and the check engine light came on after a few miles. Have an appointment in two days (diesel tech not in until August 1st). In the meantime, we have taken two 40 mile trips, one pulling a 5,000 trailer. Check engine light is still on, not flashing ..., 7E8 engine code appears when the engine control module of a car does not function at the optimized level. It indicates the defects of the intake manifold, emission system, and fuel passages. It shows the poor performance of fuel lines, clogging, and PCM malfunctioning. Also, one of the primary signs of 7E8 is excessive motor idling and vibrations., The 7e8 and 7e9 engine codes can be triggered by various factors. Some common causes include faulty oxygen sensors, issues with the fuel system, vacuum leaks, malfunctioning catalytic converters, and problems with the ignition system. It is essential to diagnose the specific cause accurately to address the underlying issue effectively., Nothing puts a damper on your work life like a bad boss, but at times—particularly in a down economy—simply finding a new job isn't an option. Nothing puts a damper on your work li..., SOURCE: I need to know what the definition for fault code P0138 is the O2 sensor (bank1 sensor2) has malfunctioned.Check the fuse box under the hood and look for a bad fuse and relay to the O2 sensor and also check the wire harness.Look for chrushed/broken clips from the O2 sensor to the frame harness. O2 sensor2 is the down stream sensor and should not have any performance problem to your ..., sure and these are not codes $7ea $7EE $7E8. Ask Your Own Chevy Question. John - had a parts store pull the codes and they are P0401 - Exhaust Gas Recirculation Flow Insuffient detected. P0101 - Mass or Volume Air Flow A circuit Range / Performance.